2. 外语
  3. When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust

When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust

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问题     When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust. It is only a small planet, and travels around the sun. The sun together with its planets, travels in the Milky Way(银河), our galaxy(星系). The Milky Way has about thirty billion stars like our sun, and is one of about a hundred million galaxies in the universe.
    Because the space (空间)is so great, it is difficult to work out how far away a star is. Instead of kilometres, we have light-years. A light-year means how far light travels in one year. Our nearest neighbour galaxy is more than 9000,000 light-years away from the earth.
选项 A、the Milky Way is the only galaxy
B、other galaxies are near ours
C、the sun is a large star in the Milky Way
D、the earth is a small part of the universe
答案D
解析 本题的关联句是文章开头的第二句：在宇宙中地球就像一点灰尘一样，只有D项对地球作了描述，其余三项是对太阳、银河星系的叙述，不合题意。
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