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题型:阅读理解-单选 难度:0.65 引用次数:22 题号:18166510

When we talk about the universe, we mean not only the earth, the sun and the moon, but also the stars and space between them. There are millions of stars in our sky. The sun is one of them. Around it there are eight big planets moving, including the earth. The moon is our nearest neighbour in space. If you look at the sky on a clear night, it is possible to see about 3,000 stars. They look small, but they are really very big hot balls of burning(燃烧着的) gas. Some of them are huge, but others are much smaller like our planet Earth. The biggest stars are very bright, but they can only live for a short time. Every day new stars are born and old stars die.

All the stars are very far away. The light from the nearest star (except the sun) takes more than four years to reach the earth.

Hundreds of years ago, people used stars, like the North Star, to know which direction(方向) to travel in. Today you can still see that star.

1. The universe means ________.
A.the earthB.the sun, the moon and the stars
C.space between the starsD.All of the above.
2. The light from the nearest star (except the sun) takes more than ________ to get to the earth.
A.four yearsB.1,000 daysC.100 yearsD.four light years
3. People used to look at the North Star ________.
A.when they were workingB.to tell them when to do farm work
C.while they were travellingD.just for fun

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文章大意:本文介绍了科学家对月球的研究。

【推荐1】We have always been interested in the moon. 2, 000 years ago, people already knew it moves around the earth and where it would be in the sky at different times of the year. At that time, everything about the moon was learned by watching it carefully in the sky.

When scientists could use telescopes to study the moon more closely, their ideas began to change. They could see the moon was made of rocks. Most scientists thought moon rocks would be different from those on the earth. This was because they believed the moon had once been a planet that had been caught in the earth’s gravity (重力) millions of years earlier.

In 1969, moon rocks were finally brought to the earth and studied. Much to their surprise, scientists found that, except for water, the moon and the earth were made of the same things. Once again new ideas were needed for this new information.

After years of study, most scientists now think that the moon was once part of the earth. They believe very early in its history, maybe 4 billion years ago, something about the size of Mars hit the earth. This sent billions of rocks into space around our planet. These rocks slowly joined together and after many years became the moon.

In the future, though our ideas about the moon may change again, we will still be interested in it.

1. Before 1969, most scientists thought the moon was ________.
A.part of the earth billions of years earlierB.older than the earth
C.caught by the earth’s gravityD.made of the same things as the earth
2. What do most scientists think now about the moon and the earth?
A.The earth was once part of the moon.B.The moon used to be part of the earth.
C.Mars will hit earth in the near future.D.Rocks will join together to become another moon.
3. We can learn that ________ from this passage.
A.new information brings new ideasB.scientists in the past were not clever
C.we now know everything about the moonD.scientists are so clever that they know everything
2024-01-25更新 | 16次组卷
阅读理解-单选(约200词) | 适中 (0.65)
文章大意:本文主要介绍了黑洞的外观及科学家们如何拍摄到了黑洞的照片。

【推荐2】What do black holes look like? Human beings have wanted to know about it for a long time. In 2019, we finally got the answer: They look like dark circles with a bright ring around the outside.

Scientists took the world’s first photo of a black hole. Scientists didn’t use a camera to take the picture. They used eight radio telescopes (射电望远镜) in different places around the world. The telescopes got signals (信号) from the black hole. Scientists used computers to process the signals. It took them two years to get the final picture.

The black hole is very far from Earth—about 55 million light-years away. One light-year is the distance that light travels in one year. One light-year is about 9 trillion (万亿) kilometers.

This is not the only black hole in the universe (字宙). Actually, scientists believe every large galaxy (星系) has a big black hole at its center. The one in our galaxy is called Sagittarius A.

Black holes are some of the most mysterious things in the universe. This photo can help us learn more about them.

1. We can read this passage in a ________.
A.storybookB.novelC.travel guidebookD.science magazine
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A.many black circles inside each otherB.dark holes with a bright center
C.dark circles with a bright ring around the outsideD.black holes with colorful rings in the center
3. How far is the black hole from Earth?
A.It’s about 495 million trillion kilometers.B.It’s about 55 million kilometers.
C.It’s about 495 million kilometers.D.It’s about 9 trillion kilometers.
4. What is Sagittarius A?
A.The large galaxy in the universe.B.The black hole in our galaxy.
C.The name of the radio telescopes.D.The center of the black hole.
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【推荐3】阅读短文及文后A—E 选项,选出可以填入各题空白处的最佳选项,并在答题卡上将该项涂黑。

From a plane we can see the fields, cities, mountains or seas below.     1    . People and man-made satellites have been sent out into space to observe the Earth carefully and people have learnt more about the Earth in the last few years.

    2    . But it can be very terrible when there is a strong wind.

The sea is very huge. It’s nearly covers three quarters of the Earth. The sea is also very deep in some places.     3    . The highest mountain in the world is about 9 kilometers high. If that mountain was put into the sea at that place, there would be still 2 kilometers of water above it!

In most parts of the sea, there are many kinds of fishes and plants.     4    . Others live deep down. There are also a lot of small living things, and quantities of fishes live by eating them.

The sea can be very cold. When people go down, the sea becomes colder and colder.     5    . But in 1970, five women scientists lived in the deep sea for fourteen days.

A.Some live near the top of the sea.
B.If we go into space, we see more and more of the Earth.
C.Only some men could go down into the deep sea at first.
D.The sea looks very beautiful when the Sun is shining on it.
E.There is one place where the sea is about 11 kilometers in depth.
2022-02-26更新 | 198次组卷
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