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外语
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
2014-01-13
50
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
动词词组辨析。given off“释放”;put out“伸出;出版;扑灭”;set off“出发,动身;开始,引起”;used up“筋疲力尽,枯竭”。根据句中chemical change提供的信息,可知化学变化只能是以某种形式energy的“释放”。故答案为A。
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