DIch sang TVIet : Virgin Galactic to Unveil New Space Tourism Rocket PlaneVirgin Galactic will roll out a new version of its SpaceShipTwo space tourism rocket Friday as it prepares to return to flight...

Virgin Galactic chuẩn bị tiết lộ Máy bay tên lửa du lịch vũ trụ mớiVirgin Galactic sẽ tung ra một phiên bản mới của tên lửa du lịch không gian SpaceShipTwo của nó vào Thứ Sáu khi nó chuẩn bị để trở về thử nghiệm chuyến bay lần đầu tiên kể từ khi một vụ tai nạn năm 2014. SpaceShipTwo được thiết kế để bay bởi một trong hai phi hành đoàn và đưa sáu hành khách đến rìa không gian. Ở độ cao trên 62 dặm, hành khách sẽ trải nghiệm một vài phút không trọng lượng và xem trái đất bên dưới.Sau nhiều năm phát triển, Virgin Galactic dường như đang đến gần mục tiêu làm cho dân thường thành phi hành gia. SpaceShipTwo đầu tiên đã vỡ ra thành từng mảnh vào ngày 31 tháng mười năm 2014. Cuộc điều tra cho thấy phi công phụ Michael Alsbury đã mở khoá cái gọi là hệ thống phủ đầy lông nhằm mục đích làm chậm lại và ổn định con tàu khi nó vào lại khí quyển. Alsbury đã bị chết, nhưng phi công Peter Siebold, mặc dù bị thương nặng, đã nhảy dù an toàn.Câu trả lời: Virgin Galactic chuẩn bị tiết lộ Máy bay tên lửa du lịch vũ trụ mớiVirgin Galactic sẽ tung ra một phiên bản mới của tên lửa du lịch không gian SpaceShipTwo của nó vào Thứ Sáu khi nó chuẩn bị để trở về thử nghiệm chuyến bay lần đầu tiên kể từ khi một vụ tai nạn năm 2014. SpaceShipTwo được thiết kế để bay bởi một trong hai phi hành đoàn và đưa sáu hành khách đến rìa không gian. Ở độ cao trên 62 dặm, hành khách sẽ trải nghiệm một vài phút không trọng lượng và xem trái đất bên dưới.Sau nhiều năm phát triển, Virgin Galactic dường như đang đến gần mục tiêu làm cho dân thường thành phi hành gia. SpaceShipTwo đầu tiên đã vỡ ra thành từng mảnh vào ngày 31 tháng mười năm 2014. Cuộc điều tra cho thấy phi công phụ Michael Alsbury đã mở khoá cái gọi là hệ thống phủ đầy lông nhằm mục đích làm chậm lại và ổn định con tàu khi nó vào lại khí quyển. Alsbury đã bị chết, nhưng phi công Peter Siebold, mặc dù bị thương nặng, đã nhảy dù an toàn.

Bài của mình là 10/10. Còn bạn bao nhiêu? Cho mình xin tên nick để kết bạn luôn.Câu trả lời: Bài của mình là 10/10. Còn bạn bao nhiêu? Cho mình xin tên nick để kết bạn luôn.

DIch sang TVIet : Virgin Galactic to Unveil New Space Tourism Rocket PlaneVirgin Galactic will roll out a new version of...

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Dương Minh

26 tháng 2 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The word burnt in the first sentence is closest in meaning to __________ .

A. expense

B. unhappiness

C. subject

D. contentment

#Mẫu giáo

1

NH

Nguyen Hoang Hai

26 tháng 2 2019

ĐÁP ÁN C

Từ “brunt” trong câu 1 gần nghĩa với từ nào nhất?

A. expense (n): chi phí

B. unhappiness (n): sự không vui

C. subject (n): chủ đề = brunt (n)

D. contentment (n): sự bằng lòng

Tạm dịch: Trong một khoảng thời gian, kính viễn vọng Hubble đã là chủ đề để chế giễu và thể hiện sự phẫn nộ của những người tin rằng chính quyền Hoa Kì đã bỏ ra quá nhiều tiền vào những dự án nghiên cứu vũ trụ không phục vụ một mục đích cụ thể nào.

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Dương Minh

17 tháng 12 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The author implies that the satellite that carries the Hubble was specifically designed so that________ .

A. maintenance could be done by traveling astronauts.

B. the Hubble could move easily.

C. the mirror could contract and expand.

D. the known defective mirror could be replaced in space rather than on Earth.

#Mẫu giáo

1

NH

Nguyen Hoang Hai

17 tháng 12 2019

ĐÁP ÁN A

Nhà văn cho rằng vệ tinh mang Hubble được thiết kế cụ thể để:

A. chỉ có những phi hành gia di động mới có thể bảo hành nó.

B. Hubble có thể di chuyển dễ dàng.

C. cái gương có thể co lại và dãn ra.

D. cái gương bị gỏng có thể được thay thế ở ngoài vụ trũ thay vì trên Trái Đất.

Dẫn chứng: “It was not until 1993 that the crew of Shuttle Endeavour arrived like roadside mechanics…”

Tạm dịch: Chỉ đến năm 1993, khi các thành viên của tàu Endeavour đến như thợ sửa máy bên lề đường, mở cửa tàu và thay gương hỏng bằng một cái gương mới, nó mới bình thường trở lại.

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Dương Minh

14 tháng 10 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The author compares the astronauts of the Endeavor to __________ .

A. astronomers.

B. mechanics.

C. politicians.

D. scientists.

#Mẫu giáo

1

NH

Nguyen Hoang Hai

14 tháng 10 2019

ĐÁP ÁN B

Tác giả so sánh các phi hành gia của phi thuyền Endeavour với:

A. nhà thiên văn học

B. thợ sửa máy

C. chính trị gia

D. nhà khoa học

Dẫn chứng: “the crew of Shuttle Endeavour arrived like roadside mechanics”

Tạm dịch: Các thành viên của tàu Endeavour đã đến như thợ sửa máy bên lề đường.

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Dương Minh

14 tháng 1 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The author implies that at the time the Hubble was initially deployed from the Earth _______ .

A. there was little attention paid to it.

B. it was already known that the mirror was defective.

C. there was considerable excitement about potential uses.

D. all attention was focused on the space shuttle, not the Hubble.

#Mẫu giáo

1

NH

Nguyen Hoang Hai

14 tháng 1 2017

ĐÁP ÁN C

Nhà văn cho rằng tại thời điểm Hubble được triển khai ngoài Trái Đất:

A. hầu như không có sự chú ý nào hướng đến nó.

B. nhiều người tin rằng khai thác vũ trụ chỉ tốn thời gian.

C. có một sự phấn khích lớn về tiềm năng của nó.

D. tất cả mọi sự chú ý đều được dồn vào phi thuyền vũ trụ, không phải Hubble.

Dẫn chứng: “The Hubble was sent into orbit with amid huge hype and expectatiom.”

Tạm dịch: Hubble được phóng vào quỹ đạo giữa sự phấn khích và kì vọng lớn.

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Dương Minh

8 tháng 11 2018

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

According to the passage, a Cepheid variable is __________ .

A. a mirror

B. a star

C. a Hubble calculations

D. the dimming and brightening of a star

#Mẫu giáo

1

NH

Nguyen Hoang Hai

8 tháng 11 2018

ĐÁP ÁN B

Theo đoạn văn, biến quang Cepheid là:

A. một cái gương

B. một ngôi sao

C. một phép tính Hubble

D. sự tối đi và sáng lên của một ngôi sao

Dẫn chứng: “Astronomers use stars known as Cepheid variables to measure distances in space.”

Tạm dịch: Các nhà thiên văn học dựa vào các vì sao được biết đến dưới tên biến quang Cepheid để định lượng khoảng cách trong vũ trụ.

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Dương Minh

17 tháng 5 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The word billowing in the third paragraph is closest in meaning to __________ .

A. sitting

B. exploding

C. stopping

D. pouring

#Mẫu giáo

1

NH

Nguyen Hoang Hai

17 tháng 5 2017

ĐÁP ÁN D

Từ “billowing” ở đoạn 3 gần nghĩa với từ nào nhất?

A. sitting (v): ngồi

B. exploding (v): phát nổ

C. stopping (v): dừng lại

D. pouring (v): tràn ra = billowing (v)

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Dương Minh

27 tháng 10 2017

Read the following text and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone...

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Read the following text and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction.

Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.

The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space.

The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.

According to the passage, the highest amount of pheromone vapor is found

A. in the source of food

B. in the receptors of the ants

C. under the soil along the trail

D. just above the trail

#Mẫu giáo

1

NH

Nguyen Hoang Hai

27 tháng 10 2017

D

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, lượng pheromone cao nhất được tìm thấy

A. trong nguồn thức ăn

B. trong các thụ thể của kiến

C. dưới đất dọc theo dấu vết

D. ngay phía trên dấu vết

Thông tin: A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail

Dịch bài đọc:

Nhiều con kiến đi kiếm thức ăn với số lượng lớn và di cư nhiều; những hoạt động này diễn ra bởi một con kiến tạo ra một dấu vết trên mặt đất để những con khác đi theo. Khi một con kiến thợ trở về nhà sau khi tìm ra nguồn thức ăn, nó đánh dấu đường đi bằng chạm ngòi của nó ngắt quãng trên mặt đất và để một lượng pheromone nhỏ - một hỗn hợp các chất hóa học cung ứng các thông điệp đa dạng khi bối cảnh thay đổi. Những dấu vết này không kết hợp thông tin phương hướng và có thể được đi theo sau bởi các con kiến khác ở cả hai hướng.

Không giống như một số thông điệp khác, chẳng hạn như một thông điệp phát sinh từ một con kiến chết, một con đường kiếm ăn phải được giữ bí mật khỏi các loài khác. Không có gì đáng ngạc nhiên khi kiến sử dụng nhiều loại hợp chất như dấu vết pheromones. Kiến có thể rất nhạy cảm với những tín hiệu này. Các nhà điều tra làm việc với dấu vết pheromone của loài kiến cắn lá Atta texana tính toán rằng một miligam của chất này sẽ đủ để dẫn một dãy kiến đi ba lần vòng quanh Trái đất.

Hơi của pheromone bay hơi trên dấu vết sẽ dẫn một con kiến dọc theo con đường, và con kiến phát hiện ra tín hiệu này với các thụ thể trong ăngten của nó. Một dấu vết pheromone sẽ bay hơi để cung ứng nồng độ hơi cao nhất trên dấu vết, trong cái gọi là không gian hơi. Khi đi theo dấu vết, kiến di chuyển sang phải và trái, dao động từ bên này sang bên kia đường thẳng của dấu vết, đưa ăngten đầu tiên và sau đó là ăngten khác vào không gian hơi. Khi con kiến di chuyển sang phải, ăng ten bên trái của nó sẽ đến không gian hơi. Các tín hiệu nhận được làm cho nó ngoặt sang trái, và con kiến phía sau đó theo cách này cho đến khi các ăng-ten bên phải của nó đến không gian hơi. Sau đó nó quay về phía bên phải, và tới lui theo dấu vết.

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Dương Minh

6 tháng 7 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The author states that the Hubble was not always popular because__________ .

A. it was more expensive than most space shuttles.

B. many people believed space exploration was a waste of time.

C. people were afraid of what might be found.

D. it was defective for its first three years in space.

#Mẫu giáo

1

NH

Nguyen Hoang Hai

6 tháng 7 2019

ĐÁP ÁN D

Tác giả cho rằng không phải lúc nào Hubble cũng phổ biến vì?

A. Nó đắt khác hơn hầu hết các loại phi thuyền vũ trụ khác.

B. Nhiều người tin rằng du hành vũ trụ chỉ tốn thời gian.

C. Con người sợ thứ mình có thể tìm được.

D. Nó gặp sai sót nhiều trong không gian trong 3 năm đầu.

Dẫn chứng: “Yet after it was in position, it simply did not work, because the primary mirror was mishapen. It was not until 1993 that the crew of Shuttle Endeavour arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.”

Tạm dịch: Nhưng sau khi được đưa vào hoạt động, nó lại không hiệu quả, vì gương chính bị tạo hình sai. Phải đến năm 1993, khi các thành viên của tàu Endeavour đến như thợ sửa máy bên lề đường, mở cửa tàu và thay gương hỏng bằng một cái gương mới, nó mới bình thường trở lại.

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DM

Dương Minh

13 tháng 11 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

For a time, the Hubble telescope was the brunt of jokes and subject to the wrath of those who believed the U.S. government had spent too much money on space projects that served no valid purpose. The Hubble was sent into orbit with a satellite by the Space Shuttle Discovery in 1990 amid huge hype and expectation. Yet after it was in position, it simply did not work, because the primary mirror was misshapen. It was not until 1993 that the crew of the Shuttle Endeavor arrived like roadside mechanics, opened the hatch that was installed for the purpose, and replaced the defective mirror with a good one.

Suddenly, all that had originally been expected came true. The Hubble telescope was indeed the “window on the universe,” as it had originally been dubbed. When you look deep into space, you are actually looking back through time, because even though light travels at 186,000 miles a second, it requires time to get from one place to another. In fact, it is said that in some cases, the Hubble telescope is looking back eleven billion years to see galaxies already forming. The distant galaxies are speeding away from Earth, some traveling at the speed of light.

Hubble has viewed exploding stars such as the Eta Carinae, which clearly displayed clouds of gas and dust billowing outward from its poles at 1.5 million miles an hour. Prior to Hubble, it was visible from traditional telescopes on earth, but its details were not ascertainable. But now, the evidence of the explosion is obvious. The star still burns five million times brighter than the sun and illuminates clouds from the inside.

Hubble has also provided a close look at black holes, which are described as cosmic drains. Gas and dust swirl around the drain and are slowly sucked in by the incredible gravity. It has also looked into an area that looked empty to the naked eye and, within a region the size of a grain of sand, located layer upon layer of galaxies, with each galaxy consisting of billions of stars.

The Hubble telescope was named after Edwin Hubble, a 1920s astronomer who developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel. Astronomers use stars known as Cepheid variables to measure distances in space. These stars dim and brighten from time to time, and they are photographed over time and charted. All the discoveries made by Hubble have allowed astronomers to learn more about the formation of early galaxies.

The author states that Edward Hubble ___________ .

A. developed the Hubble telescope.

B. developed a mathematical formula to measure speed and distances between galaxies.

C. was the first person to use the Hubble telescope.

D. was a politician who sponsored funding in Congress.

#Mẫu giáo

1

NH

Nguyen Hoang Hai

13 tháng 11 2017

ĐÁP ÁN B

Nhà văn đã chỉ ra rằng Edward Hubble:

A. phát triển kính viễn vọng Hubble.

B. phát triển thuật đoán để đo tốc độ và khoảng cách giữa các ngân hà.

C. là người đầu tiên dùng kính viễn vọng Hubble.

D. là một chính trị gia đã tài trợ cho Quốc hội.

Dẫn chứng: “The Hubble telescope was named after Edward Hubble, a 1920s astronomer ưwho developed a formula that expresses the proportional relationship of distances between clusters of galaxies and the speeds at which they travel.”

Tạm dịch: Kính viễn vọng Hubble được đặt tên theo nhà thiên văn Edward Bubble, một nhà thiên văn học vào những năm 1920, người đã phát triển học thuyết trình bày mối tương quan giữa các vật thể trong dải ngân hà và tốc độ di chuyển của chúng.

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