In fact fuels we burn and plant food we eat ________ their chemical energy in t
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In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.| A．give in | B．give off | | C．give away | D．give up |
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答案
| B |
解析
| B 考查动词短语。句意：事实上我们烧的燃料和食用的植物性食物都以热量的形式放出它们所含有的化学能量。根据句意可知应选give off，表示“放出，发出”。 |
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