2. 外语
  3. There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001. We used to believe th

There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001. We used to believe th

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问题 There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001.
We used to believe that life could not exist under extremely hot or cold environment.
选项 A、Y
B、N
C、NG
答案A
解析 由题干关键词extremely hot or cold可将答案定位至第二个小标题下Life in the Extreme第一段第二句。Furthermore，it was thought that you would probably not find life where temperatures were extremely hot…or extremely cold…，原文中it was thought与题干used to believe同义，因此本题陈述正确。
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