单选题Why can all the astronauts sleep at the same time?AThey have to follow the same timetableBThe radio will take care of the aircraft for them.CThere are enough sleeping bags in the spacecraft.DThere is no need for them to watch over the spacecraft.
单选题
Why can all the astronauts sleep at the same time?
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.
参考解析
解析：
细节题。短文的第二段第二句补充解释了原因“No one has to stay awake to watch over the spacecraft”，他们没有必要照看飞船。D项是对这句话的同义转述，正确选项。A项无中生有，文中没有提到他们必须遵守同样的作息时间，故排除。B项是对“the craft’s computers call us on the radio”的错误理解。C项答非所问，题目问的是所有人可以同时睡觉的原因，与睡袋是否足够没有关系。
细节题。短文的第二段第二句补充解释了原因“No one has to stay awake to watch over the spacecraft”，他们没有必要照看飞船。D项是对这句话的同义转述，正确选项。A项无中生有，文中没有提到他们必须遵守同样的作息时间，故排除。B项是对“the craft’s computers call us on the radio”的错误理解。C项答非所问，题目问的是所有人可以同时睡觉的原因，与睡袋是否足够没有关系。
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