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Every chemical change either results from energy being used to produce the chang
Every chemical change either results from energy being used to produce the chang
游客
2025-03-20
16
管理
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
give off“散发出,释放出(蒸气、光、烟等没有形体的东西)”,如:give off asweet fragrance(unpleasant smell,odor,smoke and steam,vapor)“散发出香味(难闻的气味、臭味、烟和汽、蒸气)”。put out“放出;出版,生产;熄灭(火)”等,如:The boy put his tongue out for the doctor.“男孩把舌头伸出来给医生看。”set off:“出发;使爆炸”,如:The mischievous boy set off a firework just behind the old gentle—man.“顽皮的孩子们就在那位老先生的背后放了个爆竹。”use up:“用完,耗尽”,如:By that time,he had used up all his savings.“到那时他已经花完他所有的积蓄。”无论从词组的本身含义还是从句子的语义环境来看,都应该选given off。题句意:“每个化学变化要么是能产生变化的结果,要么是能以某种形式得以释放。”
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