K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

The word “ rudimentary” in paragraph 4 is closest in meaning to

A.  Advanced


 

B.  Formal


 

C. Basic


 

D. Important


 

1
10 tháng 7 2019

Đáp án là C.

rudimentary: sơ khai = basic: căn bản

Các từ còn lại: Advanced: tiên tiến; formal: chính thức; important: quan trọng

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

The word “parameters” in paragraph 1 is closest in meaning to

A. Measurements


 

B. Laws


 

C. Categories


 

D. Numbers


 

1
3 tháng 3 2019

Đáp án là A.

parameters = measurements: các thông số

Nghĩa các từ còn lại: law: luật; categories: các loại; numbers: các số đếm

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Complete the summary by choosing one sentence (A, B, C or D) that is among the most important information to fill in the blank.

A. Variable stars may differ in the amount of energy they radiate or in their luminosity.


 

B. Variable stars change in brightness and luminosity, and require a telescope with a large lens

C. Proxima Centauri, the closest star to Earth, is a binary star and requires a large telescope for observation

D. Many different types of stars exist, but the most important categories are variable and binary stars.


 

1
10 tháng 4 2019

Đáp án là B.

Câu B này chính là câu tóm tắt ý cho đoạn 2.

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

The temperature of a star can be determined by its

A. Size


 

B. Color


 

C. Movement


 

D.  Luminosity


 

1
21 tháng 1 2018

Đáp án là B.

Color. Ý trong đoạn 1: One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Complete the table by choosing a phrase to match the heading

A. Include the sun


 

B. Can be viewed without a telescope


 

C. Display the greatest luminosity


 

D. Include Proxima Centauri


 

1
17 tháng 2 2017

Đáp án là B.

Can be viewed without a telescope - Có thể được xem mà không một kính thiên văn

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

The word “radiated” in paragraph 2 is closest in meaning to

A. Received


 

B. Sent out


 

C. Burnt


 

D. Controlled


 

1
22 tháng 4 2019

Đáp án là B.

radiated: được chiếu, tỏa ra = send out: được gửi đi, phân phát

Nghĩa các từ còn lại: received: được nhận; burnt: được đốt cháy; controlled: được điều khiển

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

What is the topic of the passage?

A. Types of stars and how to observe them.


 

B. The differences between binary and variable stars


 

C. Types of telescopes


 

D. The color and temperature of stars


 

1
13 tháng 2 2018

Đáp án là A.

Các loại sao và làm thế nào để quan sát chúng. Đọc nội dung cả bài chúng ta dễ dàng chọn được đáp án này.

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Why does a telescope need to have a high-gathering ability?

A. To view stars which do not give off very much light


 

B. To view stars with a high variability


 

C. To support a lens of large diameter


 

D. All of the above


 

1
25 tháng 10 2018

Đáp án là B.

Ý trong đoạn 2: At time the degree of variability may be high, requiring a telescope with an equally high light-gathering power. Vào thời điểm mức độ biến thiên có thể cao, đòi hỏi phải có một kính thiên văn có một sức mạnh ánh sáng thu thập đều cao.

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Which of the following is true of variable stars?

A. They vary in brightness


 

B. They rotate around each other.


 

C. They vary in color.


 

D. The size of the telescope must vary in order to observe them.


 

1
26 tháng 4 2018

Đáp án là A.

Ý trong đoạn 2: Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness . Tính sáng đề cập đến lượng năng lượng bức xạ của một ngôi sao, trong khi cường độ đề cập đến độ sáng của nó

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questionsStellar AstronomyMany parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.There are different types of stars...
Đọc tiếp

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Why does the author write that “stellar astronomy is possible for everyone”?

A. To emphasize that it is easy to become an astronomer


 

B. To encourage people to try observing stars


 

C.  To show that most people know a lot about stars


 

D. To explain why astronomy is popular


 

1
9 tháng 9 2017

Đáp án là B

“stellar astronomy is possible for everyone “ - Thiên văn học về sao là có thể cho tất cả mọi người.

B. Để khuyến khích mọi người cố gắng quan sát sao