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多项选择题

以下属于绝对化要求的是()
A、“我必须获得成功”
B、“别人必须很好地对待我”
C、“我可以失败”
D、“生活应该是很容易的”

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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.
" Background music" in the passage means .
A.musicplayedintheconcert
B.akindofnoisecomingintoyourears
C.musicwhichhelpspeopletoconcentrate
D.musicplayedwhilepeopleareworking
单项选择题
按固定污染源烟气排放连续监测系统（CEMS）技术要求，颗粒物CEMS24小时零点漂移范围不得超过满量程的比例是（ ）。
A.0.025
B.0.02
C.0.015
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位错，层错等缺陷越多，半导体的少子寿命越短
A、正确
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