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  3. There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001. In the extremely hot

There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001. In the extremely hot

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问题 There may be other life forms in the universe because over 50 extrasolar planets were discovered in 2001.
In the extremely hot and dry environment, creatures are imagined to have ______ to minimize loss of water and conserve it.
选项
答案thick coverings or skins
解析 题干关键词minimize loss of water与原文minimize evaporation同义，因此将答案定位至第三个小标题下第四段第三句。Both have thick coverings or skins to minimize evaporation and conserve water。
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大学英语六级

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