下列生活实例中，属于内能转化为机械能的是
- A.冬天人们常用双手互相摩擦取暖
- B.用茶壶烧水，水烧开时，茶壶盖被顶起
- C.钻木取火
- D.四冲程汽油机的压缩冲程
正确答案及解析
正确答案
B
解析
暂无解析
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