2. 外语
  3. Project Sky lab was designed to demonstrate that a person can work and live in space for prolonged periods without ill effects.

Project Sky lab was designed to demonstrate that a person can work and live in space for prolonged periods without ill effects.

admin2012-07-30  43
问题 Project Sky lab was designed to demonstrate that a person can work and live in space for prolonged periods without ill effects.
选项 A、unexpected
B、obvious
C、adverse
D、immediate
答案C
解析 坏的，有害的
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