PASSAGE FOUR What is the aim of preparing personalized gene-based medicine?

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问题 PASSAGE FOUR
What is the aim of preparing personalized gene-based medicine?

选项

答案To ensure astronauts fly in the best possible condition．

解析由题干中的aim定位至第五段。该句指出，目的并不是为了清除航天员的不足，而是为了保证他们尽可能以最好的状态飞去太空。故答案为To ensure astronauts fly in the best possible condition．

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