单选题：Which of the following statements is true

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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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Itwill take you one hour and fifty minutes __________the top

Itwill take you one hour and fifty minutes __________the top of Mount Tai.A．reac

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Paragraph 5

Paragraph 5 A．Loss of the beloved companion B．Maternal love to the fellow scien

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For a moment, his life was in jeopardy

For a moment, his life was in jeopardyA．danger B．jealousy C．justice D．leopard

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We cannot help asking ifsandstorm is a pure natural phenomen

We cannot help asking ifsandstorm is a pure natural phenomenon over which we hav

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