单选题：Which of the following statements is true

题目分类：理工类
题目类型：单选题
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题目内容：

Which of the following statements is true A．Exposure to even tiny amounts of radiation is fatal.
B．The effect of exposure to radiation is slow in coming.
C．Radiation is avoidable in space exploration.
D．Astronauts in spacesuits needn’t worry about radiation damage

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答案解析：

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分类：理工类题型：单选题

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分类：理工类题型：单选题