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考研
Every chemical change either results from energy being used to produce the change, or causes energy to be ______ in some form.
Every chemical change either results from energy being used to produce the change, or causes energy to be ______ in some form.
admin
2008-12-26
52
问题
Every chemical change either results from energy being used to produce the change, or causes energy to be ______ in some form.
选项
A、given off
B、put out
C、set off
D、used up
答案
A
解析
本题为短语动词词义辨析题。give off意为"放出,发出";put out意为"扑灭;生产";set off意为"出发,开始";use up意为"用完,耗尽"。根据题意,化学反应不是由某一能量引发就是反应本身引发某一能量的释放,故选项given off为正确答案。
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考研英语一
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