A. when it is absorbed by matter B. when it is cloudy C. because they can pass through solid objects D. when the sunrays are fie

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问题 A. when it is absorbed by matter
B. when it is cloudy
C. because they can pass through solid objects
D. when the sunrays are fierce
E. when a change in the nucleus of an atom takes place
F. when electron rearrangement takes place
Chemical energy is generated______.

选项

答案F

解析 借助问题句中的特征词chemical energy作为答案线索词,在第五段倒数第四句找到答案相关句(Chemical energy comes from electron(电子)rearrangement.),确认答案为F。
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