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脱水患儿输液时累积损失量应于多少小时内补完 A.
3~4h B.
4~6h C.
6~8h D.
8~12h E.
12~16h

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企业在日常活动中发生的、会导致所有者权益减少的、与向所有者分配利润无关的经济利益的总流出，指的是()。
A.费用
B.收入
C.资产
D.负债
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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 aeroplanes, transistor radios, oil powered engines, etc．, are almost
everywhere．We seem to be getting used to noise, too．Some people feel quite lonely without background 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) may even help people to concentrate．
Scientists have discovered that what prevents people from concentrating is_______．
A.anykindofnoise
B.greatchangesinlevelofnoise
C.backgroundnoise
D.variousbackgroundmusic
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桥梁主要部件材料有严重缺损，或出现中等功能性病害，且发展较快，结构变形小于或等于规范值，功能明显降低，其技术状况评定标度应为（ ）
A.2类
B.3类
C.4类
D.5类
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