下面关于分子动理论和物体内能变化的说法,不正 确的是(   ) 

下面关于分子动理论和物体内能变化的说法,不正 的是(                                                                                                     

A.钢水冷却,温度降低,内能一定不减少

B.压在一起的铅片和金片几年后剖开,切面互相渗透,属于扩散现象

C.冬天用热水袋取暖,人体感到暖和,是用做功的方法改变物体的内能

D.“和平号空间站”退役后坠入大气层与空气摩擦生热是用热传递方法改变物体内能

答案

ACD    

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