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  3. Nowadays, more people are living closer together, and they use machines to produce leisure. As a result, they find that their le

Nowadays, more people are living closer together, and they use machines to produce leisure. As a result, they find that their le

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问题     Nowadays, more people are living closer together, and they use machines to produce leisure. As a result, they find that their leisure, and even their working hours, become (1)_____ by a byproduct of their machines, (2)_____ noise. Noise is in the news; it has acquired political (3)_____, and public opinion is demanding, more and more (4)_____, that something (5)_____ about it.
    To control noise is to demand much (6)_____(Annoyance arises often from, (7)_____ of common courtesy), a sense of proportion (There is usually a (8)_____ of interest if a noise is to be stopped), the (9)_____ of money (and it is far more economical to do this early (10)_____ than late), and, finally, technical knowledge.
    Though the (11)_____ care for noise is to stop it at its source, this may in many (12)_____ be impossible. The next (13)_____ is to absorb it on its way to the ear. Domestic noises may be controlled by forethought and (14)_____, and industrial noises by good planning and technical (15)_____ But if we are going to (16)_____ fast motor-cycles and heavy (17)_____ lorries to pass continuously through residential and business (18)_____, the community must decide (19)_____ the control it needs to (20)_____ for in the long run it has got to pay for it.

选项 A、perfection
B、improvement
C、investigation
D、adoption
答案B
解析 technical improvement"技术改进"。
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