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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