Question

We have always been interested in the moon. 2000 years ago people already knew it moved 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(望远镜) 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 Earth. This was because they believed the moon had once been a planet(行星) 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 Earth. They believe very early in its history, maybe 4 million years ago, something about the size of Mars（火星） hit 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, even though our ideas about the moon may change again, we will still be interested in it.

1.In the passage the writer wants to tell us ___________________.

A. why people are interested in the moon

B. how ideas about the moon have changed over time

C. where the moon came from in the past

D. that people have finally learned the truth about the moon.

2.Before 1969 most scientists thought the moon was ___________________.

A. part of the earth billions of years earlier

B. older than the earth

C. a planet caught by the earth’s gravity

D. made of the same things as the earth

3.From this passage we can learn that ___________________.

A. scientists in the past were not clever

B. the earth was once part of the moon

C. we now know everything about the moon

D. new information brings new ideas

Answer

1.B

2.C

3.D

【解析】

试题分析：本文叙述了人们对于月球的观点随时间而变化。人们一直对月球很感兴趣，2000年前人们已经知道它围绕着地球转，那时关于月亮的一切都是通过仔细观察获取的。后来有了望远镜，再后来经过科学家的多年研究人们对月球有了新的认识。

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考点：科学类短文阅读