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[主观题]

______ have been made for nearly three decades to increase the amount of precipitation fro

m clouds by seeding them with salt or silver iodide.

A．Devices

B．Hypotheses

C．Attempts

D．Commissions

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更多“______ have been made for near…”相关的问题

第1题

What kind of human being will the future spaceman be?Will he need bones of steel and pow

What kind of human being will the future spaceman be？

Will he need bones of steel and powerful muscles to resist rocket thrust，the lungs of a glass blower，a mighty heart，the calmness of an acrobat，unconscious death urges，or a schizophrenic(患精神分裂症的)drove toward isolation？ Popular ideas of a spaceman tend to be funny composites of fiction and fact.

A more realistic portrait emerges from the young science of bioastronautics，the newest and strangest of medical disciplines.The astronaut may be described as a young man of high intelligence who is normal to an abnormal degree.On earth he may well have been a high diver，high jumper，pole vaulter，or acrobat.He must be highly motivated，carefully trained，and he must want to come back.

His heart and lungs must be healthy but need not be exceptionally developed，for his cabin will be pressurized.Huge muscles may actually be disadvantageous，for he will have almost no way to get exercise，and he will find that the strength of a year old child is adequate in the weightlessness of space.A firm body and a short， strong neck will help him to withstand(抗拒;经得起……)the tremendous forces encountered at take off.Most important physically，his digestive system must be one that will not be upset by weightlessness;he must not be subject to motion sickness.

() 41.All the following are popular beliefs about the future spaceman EXCEPT that .

A.faced with isolation，he is brave enough and not liable to go mad

B.he needs to have a strong death complex

C.he must have strong bones and powerful muscles

D.he must be cool headed

() 42.Which of the following is NOT be considered by the author as a more realistic image of the future spaceman？

A.He must have superior intelligence.

B.He is young.

C.He should have a strong desire to survive.

D.He doesn’t get upset easily.

43.Bioastronautics is mostly related to .()

A.literature

B.the science of medicine

C.biology

D.disciplines and regulations

44.“normal to an abnormal degree”(Para.3)means .()

A.seemingly normal but actually abnormal

B.so ordinary that he is undistinguished in every way

C.extremely healthy，and there is nothing abnormal with him

D.so normal that no one believes it is true

45.To the future spaceman，what is most physically important is that .()

A.his vital capacity must be as great as a glass blowers

B.he must have a short and firm neck

C.his heart must be comparatively large

D.his digestive system should not be upset by weightlessness

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第2题

I was desperately nervous about becoming car-free. But eight months ago our elderly people

carrier was hit by a passing vehicle and the damage was so bad it had to be written off. No problem, I thought: well buy another. But the insurance payout didnt even begin to cover the costs of buying a new car—I worked out that, with the loan wed need plus petrol, insurance, parking permits and tax, we could easily be looking at around ￡600 a month. And thats when I had my fancy idea. Why not just give up having a car at all？ The more I thought about it, the more sensible it seemed. I live in London. We have a railway station behind our house, a tube station 10 minutes walk away, and a bus stop at the end of the street. A new car club had just opened in our area, and one of its shiny little red Peugeots was parked nearby If any family in Britain could live without a car, I reasoned, then surely we were that family？ But my new car-free passion, sadly, wasnt shared by my family. My teenage daughters were horrified. What would their friends think about our family being "too poor to afford a car"？(I wasnt that bothered what they thought, and I suggested the girls could take the same approach.) My friends, too, were astonished at our plan. What would happen if someone got seriously ill overnight and needed to go to hospital？(an ambulance？)How would the children get to and from their many events？(buses and trains？)People smiled indulgently, as though this was another of my mad ideas, before saying they were sure Id soon realize that a car wasnt a luxury, it was a necessity. Eight months on, I wonder whether well ever own a car again. The idea that you "have" to own a car, especially if you live in a city, is all in the mind. I live— and many other city-dwellers do too—in a community that has never been better served by public transport, and yet car ownership has never been higher. We worry about rising car costs, but wed be better off asking something much more basic. Do I really need a car？ The answer turned out to be no, and Im a lot richer because I dared to ask the question.

The author decided to live a car-free life______.

A．after his car was damaged beyond repair

B．after he was hurt in a terrible car accident

C．because public transport was easily accessible

D．because the traffic jam was too much for him

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第3题

Was it the manager who walked by_____

A.It must be that

B.It must have been

C.He must be it

D.Must have been it