2.C 细节理解题。根据第三段倒数第三句和最后一句“You can end up with what astronauts call a carbon-dioxide headache.”可知应选C项。
3.D 推理判断题。根据第四段中的“Your inner ear thinks you’re falling.Meanwhile your eyes are telling you you’re standing straight.That can be annoying—that’s why some people feel sick.”可知应选D项。
4.B 细节理解题。根据第五段最后一句“NASA is worried about two things...how to maintain...to Mars.”可知应选B项。
二、语法填空(共10小题;每小题1.5分,满分15分)
Rene Laennec was a French doctor who learned to tap on people’s chests to find out illness from an Austrian doctor 1.(name) Leopold Auenbrugger.As a boy,Leopold used to tap wine containers in his father’s inn to see how much wine they held.A full one made a different sound 2. an empty one.When he became a doctor,he tapped people’s chests to see how much liquid was in their lungs.Laennec did 3. same and learned to tell by tapping carefully on a chest 4. it was diseased or not.But he was even more interested in diseases of the heart,and he wished that he could hear heartbeats 5.(clear).In those days,a doctor would place his head on a patient’s chest to listen,but if the patient was extremely fat it was 6.(possible) to hear any heartbeat at all.
One day when Laennec was walking in the park,he saw some girls 7.(play) with a see-saw(跷跷板).One of them scratched the end of the board while the others placed their ears against the other end.On walking up,the doctor 8.(ask) why the sounds traveled along the wood.“The sounds are magnified(放大),girls,er...”Suddenly he turned and rushed back to the hospital.Quickly taking some thick paper,he rolled it up like a tube and 9.(begin) listening to patients’ chests.He heard the heartbeats and their breathing.Laennec soon made a better instrument of wood,10. he called a stethoscope.Later,they were made of steel and rubber.
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