(2015·湖北高考)

　　1.What is the major challenge to astronauts when they sleep in space?

　　A.Deciding on a proper sleep position.

　　B.Choosing a comfortable sleeping bag.

　　C.Seeking a way to fall asleep quickly.

　　D.Finding a right time to go to sleep.

　　2.The astronauts will suffer from a carbon-dioxide headache when. 

　　A.they circle around on their bikes

　　B.they use microcomputers without a stop

　　C.they exercise in one place for a long time

　　D.they watch a movie while pedaling

　　3.Some astronauts feel sick on the station during the first few days because. 

　　A.their senses stop working

　　B.they have to stand up straight

　　C.they float out of their seats unexpectedly

　　D.their brains receive contradictory messages

　　4.One of NASA’s major concerns about astronauts is. 

　　A.how much exercise they do on the station

　　B.how they can remain healthy for long in space

　　C.whether they can recover after returning home

　　D.whether they are able to go back to the station

　　【文章大意】本文是一篇说明文,作者通过举例介绍在太空中生活是什么样的。

　　1.A　细节理解题。根据第二段第二句“Its position presents its own challenges.”以及下文的介绍可知,应选A项。

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