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单项选择题

某项目建设临时占用10亩湖滨芦苇滩地，项目建成后该临时占地应恢复为（　）。

A.林地
B.草地
C.园地
D.湿地
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单项选择题
关于砌筑砂浆的说法，错误的是（　　）。
A.施工中不可以用强度等级小于M5的水泥砂浆代替同强度等级水泥混和砂浆
B.配置水泥石灰砂浆时，不得采用脱水硬化的石灰膏
C.砂浆现场拌制时，各组分材料应采用体积计量
D.砂浆应随拌随用，气温超过30℃时应在拌成后2h内用完
判断题
土壤容重大于土壤密度。
正确
错误
单项选择题
Life gets noisier every day and very few people can free from noise of some sort or another. It doesn′ t matter where you live--in the middle of a modern city, or a faraway village--the chances that you will be disturbed by jet aero planes, transistor radios, oil powered engines, etc. , are almost everywhere. We seem to be getting used to noise, too. Some people feel quite lonely without back-ground music while they are working.
Scientific tests have shown that total silence can be very frightening experience for human beings. However, some people enjoy listening to pop music which is very loud, and this can do harm to their eardrums(耳鼓). The noise level in some disco is far above the usual safety level for heavy industrial areas.
One recent report about noise and concentration(专心,) suggested that although a lot of people say that any noise disturbs their concentration, what really affects their ability to concentrate is a change in the level of noise. It goes on to say that a background noise, which doesn′ t change too much (music, for example) lnay even help people to concentrate.
From this passage, the pollution of noise
A.doesn'tmattermuch
B.hasbecomeworseeverywhere
C.hasbecomebetterinbigcities
D.hasbecomebetterinvillages
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