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  3. According to the first paragraph, the atmosphere is essential to man in that ______. It can be inferred from the passage that _

According to the first paragraph, the atmosphere is essential to man in that ______. It can be inferred from the passage that _

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问题 According to the first paragraph, the atmosphere is essential to man in that ______.
It can be inferred from the passage that ______.
选项 A、the Apollo mission was very successful
B、protection from space radiation is not an easy job
C、astronauts will have deformed children or grandchildren
D、radiation is not a threat to well-protected space explorers
答案B
解析 本题为推理题。从文中我们可以得知人们在太空很容易遭受辐射的危害，宇航服和大空飞船能够帮助人们遮挡许多。但人体所能承载的辐射量有限，而且至今还没有发现什么有效的药物。据此，我们可以推理得知防护太空辐射并非易事。
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