2. 外语
  3. 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.

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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表示“释放，放出”；put out表示“扑灭；生产”；set off表示“动身；开始”；use up表示“用光，用完”。
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