题目内容

听力原文：W: Will you take biology next semester？
M: I've had enough science courses.
Q: What does the man mean？
(16)

A. He likes biology enough to continue with it.
B. His grades in science courses are very good.
C. He hasn't taken enough courses in biology.
D. He doesn't want to take any more science courses.

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【C17】

A. But
B. Thus
C. Though
D. However

【C18】

A. concern
B. event
C. care
D. incident

A well-documented body of information exists. It shows that noise can【C1】humans in both physiological and psychological ways. Hearing losses in【C2】occupations such as boiler-making and construction work are well known. In fact,【C3】, we all find hearing more difficult as we【C4】. Young ears can distinguish a wide【C5】of sounds from low to very high frequencies,【C6】older ears lose the ability to distinguish high-pitched sounds. A comparison of some【C7】versus (与......相对) non-industrialized peoples suggests that this heating loss may not be the must-be result of old age.【C8】,.a closer examination of other data reveals【C9】effects. For instance, airports are currently operating at【C10】capacity because of noise regulations which【C11】their hours of operation. Job performance call be seriously affected by loud noise, especially if accuracy and【C12】effort are involved. The Use of outdoor areas for conversation is not possible for an【C13】5 to 10 million people who live or work in urban areas. When【C14】with television or speech or sleep is【C15】, as many as 22 to 44 million people can be said to have【C16】part of the use of their homes and grounds because of noise.【C17】noise pollution is a serious environmental【C18】.
Much more【C19】should be made to warn people【C20】the grave effects which may stem from an excessively noisy environment.
【C1】

A. affect
B. change
C. effect
D. excite

【C9】

A. economical
B. economic
C. financial
D. physical