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
Infrared radiation can produce heat______.

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答案A

解析 根据第三段第三、四句可知,红外线是电磁波,当它被物质吸收时,会产生能量。
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