Two points A and B are on the same side of line d. The distance from A to d is 10cm, the distance from B to d is 16cm. C...

Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements feltno more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.

The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun. In theory, there is a gravitational attraction between the water and even the outermost star of the universe. In reality, however, the pull of remote stars is so slight as to be obliterated by the control of the Moon and, to a lesser extent, the Sun. Just as the Moon rises later each day by fifty minutes, on the average, so, in most places, the time of high tide iscorrespondingly later each day. And as the Moon waxes and wanes in its monthly cycle, so the height of the tide varies. The tidal movements are strongest when the Moon is a sliver in the sky, and when it is full. These are the highest flood tides and the lowest ebb tides of the lunar month and are called the spring tides. At these times, the Sun, Moon, and Earth are nearly in line and the pull of the two heavenly bodies is added together to bring the water high on the beaches, to send its surf upward against the sea cliffs, and to draw a high tide into the harbors. Twice each month, at the quarters of the Moon, when the Sun, Moon, and Earth lie at the apexes of a triangular configuration and the pull of the Sun and Moon are opposed, the moderate tidal movements called neap tides occur. Then the difference between high and low water is less than at any other time during the month.

Choose A, B, C, or D

1. The main point of the first paragraph is ...

A. The wave created by ocean currents are very large

B. Despite the strength of the wind, it only moves surface water

C. Deep ocean water is seldom affected by forces that move water

D. The tides are the most powerful force to affect the movement of ocean water

2. The word "In reality" in the third sentence of the second paragraph is closest in meaning to

A. Surprisingly

B. Actually

C. Characteristically

D. Similarly

3. According to the passage, the most vital factor in recognizing how much gravitational effect one object in space has on the tides is

A. Size

B. Distance

C. Temperature

D. Density

4. In the ninth sentence of the second paragraph, the word "configuration" is closest in meaning to

A. Unit

B. Center

C. Surface

D. Arrangement

5. Neap tides occur when

A. The sun counteracts the moon's gravitational attraction

B. The moon is full

C. The moon is farthest from the sun

D. Waves created by the wind combine with the moon's gravitational attraction

#Tiếng anh lớp 12

1

PP

Punny Punny

13 tháng 1 2019

1. The main point of the first paragraph is ...

A. The wave created by ocean currents are very large

B. Despite the strength of the wind, it only moves surface water

C. Deep ocean water is seldom affected by forces that move water

D. The tides are the most powerful force to affect the movement of ocean water

2. The word "In reality" in the third sentence of the second paragraph is closest in meaning to

A. Surprisingly

B. Actually

C. Characteristically

D. Similarly

3. According to the passage, the most vital factor in recognizing how much gravitational effect one object in space has on the tides is

A. Size

B. Distance

C. Temperature

D. Density

4. In the ninth sentence of the second paragraph, the word "configuration" is closest in meaning to

A. Unit

B. Center

C. Surface

D. Arrangement

5. Neap tides occur when

A. The sun counteracts the moon's gravitational attraction

B. The moon is full

C. The moon is farthest from the sun

D. Waves created by the wind combine with the moon's gravitational attraction

Đúng(0)

HC

Hiền Cherry

16 tháng 7 2018

Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions. Human memory, formerly believed to be rather inefficient, is really more sophisticated than that of a computer. Researchers approaching the problem from a variety of points of view have all concluded that there is a great deal more stored in our minds than has been generally supposed. Dr. Wilder Penfield, a Canadian neurosurgeon, proved that by stimulating their brains electrically, he could...

Đọc tiếp

Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
Human memory, formerly believed to be rather inefficient, is really more sophisticated than that of a computer. Researchers approaching the problem from a variety of points of view have all concluded that there is a great deal more stored in our minds than has been generally supposed. Dr. Wilder Penfield, a Canadian neurosurgeon, proved that by stimulating their brains electrically, he could elicit the total recall of specific events in his subjects’ lives. Even dreams and other minor events supposedly forgotten for many years suddenly emerged in detail.

Although the physical basis for memory is not yet understood, one theory is that the fantastic capacity for storage in the brain is the result of an almost unlimited combination of interconnections between brain cells, stimulated by patterns of activity. Repeated references to the same information support recall. Or, to say that another way, improved performance is the result of strengthening the chemical bonds in the memory.

1. With what topic is the passage mainly concerned?

A. Wilder Penfield B. Neurosurgery

C. Human memory D. Chemical reactions

2. According to the passage, researchers have concluded that

A. the mind has a much greater capacity for memory than was previously believed.

B. the physical basis for memory is clear.

C. different points of view are valuable.

D. human memory is inefficient.

3. How did Penfield elicit dreams and other minor events from the past?

A. By surgery B. By electric stimulation C. By repetition D. By chemical stimulation

4. According to the passage, the capacity for storage in the brain

A. can be understood by examining the physiology.

B. is stimulated by patterns of activity.

C. has a limited combination of relationships.

D. is not influenced by repetition.

5. The word “bonds” in the last line means

A. promises. B. agreements. C. connections. D. responsibilities

#Tiếng anh lớp 12

1

PL

Phạm Linh Phương

16 tháng 7 2018

Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
Human memory, formerly believed to be rather inefficient, is really more sophisticated than that of a computer. Researchers approaching the problem from a variety of points of view have all concluded that there is a great deal more stored in our minds than has been generally supposed. Dr. Wilder Penfield, a Canadian neurosurgeon, proved that by stimulating their brains electrically, he could elicit the total recall of specific events in his subjects’ lives. Even dreams and other minor events supposedly forgotten for many years suddenly emerged in detail.

Although the physical basis for memory is not yet understood, one theory is that the fantastic capacity for storage in the brain is the result of an almost unlimited combination of interconnections between brain cells, stimulated by patterns of activity. Repeated references to the same information support recall. Or, to say that another way, improved performance is the result of strengthening the chemical bonds in the memory.

1. With what topic is the passage mainly concerned?

A. Wilder Penfield B. Neurosurgery

C. Human memory D. Chemical reactions

2. According to the passage, researchers have concluded that

A. the mind has a much greater capacity for memory than was previously believed.

B. the physical basis for memory is clear.

C. different points of view are valuable.

D. human memory is inefficient.

3. How did Penfield elicit dreams and other minor events from the past?

A. By surgery B. By electric stimulation C. By repetition D. By chemical stimulation

4. According to the passage, the capacity for storage in the brain

A. can be understood by examining the physiology.

B. is stimulated by patterns of activity.

C. has a limited combination of relationships.

D. is not influenced by repetition.

5. The word “bonds” in the last line means

A. promises. B. agreements. C. connections. D. responsibilities

Đúng(0)

Chúng tôi đề xuất

Tài nguyên

Ứng dụng mobile

Bảng xếp hạng

Các khóa học có thể bạn quan tâm

Yêu cầu VIP