2. 外语
  3. When the astronauts are working, sleeping bags are fastened______. Why can all the astronauts sleep at the same time?

When the astronauts are working, sleeping bags are fastened______. Why can all the astronauts sleep at the same time?

admin2008-11-28  40
问题 When the astronauts are working, sleeping bags are fastened______.
Why can all the astronauts sleep at the same time?
选项 A、They have to follow the same timetable.
B、The radio will take care of the aircraft for them.
C、There are enough sleeping bags in the spacecraft.
D、There is no need for them to watch over the spacecraft.
答案D
解析
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