2. 职称英语
  3. 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  30
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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