下列现象中.通过热传递改变物体内能的是 A.白行车轮胎放气时.气门

下列现象中.通过热传递改变物体内能的是

A.白行车轮胎放气时.气门嘴处温度会降低

B.放进冰箱冷冻室的水变成冰块

C.在汽油机的压缩冲程中，气缸内气体的温度升高

D.用手来回弯折铁丝，弯折处铁丝温度升高

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下列现象中.通过热传递改变物体内能的是 A.白行车轮胎放气时.气门

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