[题目]The threats to the health of astronauts in space are very different from on earth.A. ones B. that C. it D. those 题目和参考答案——青夏教育精英家教网—

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【题目】The threats to the health of astronauts in space are very different from __________ on earth.

A. ones

B. that

C. it

D. those

【答案】D

【解析】句意：对宇航员健康的威胁，太空中与地球上大不相同。those指代前文中的可数名词复数threats。

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A. looked like an animal

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