题干

关于热现象,下列说法错误的是(  )

A:将沸点为12.3℃的氯乙烷喷到运动员扭伤的部位,是利用了氯乙烷迅速汽化吸热

B:向热汤中滴入香油会散发出浓浓的香味,是由于温度越高热运动越剧烈

C:用锯条锯木板时温度升高,是通过热传递改变内能

D:装着开水的暖水瓶瓶塞有时会弹起来,是由于瓶内气体对瓶塞做功

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答案(点此获取答案解析)

C

同类题5

baby   car   enough    leave     anything    us
poor   rich   remember   surprised   took        whenever

    One a snowy evening, a rich lady was standing by the road. She was very worried. Her____ had broken down. Just then a poor man named Robert came. He was on his way back home from work as usual.
    The lady thought, “Is the man going to help me? He looks very cold and hungry. ”But to her ____ , he stopped and said with a smile, “What’s wrong, madam?” The lady told him what was happening.
    After forty minutes, the car was at last fixed by Robert. The lady wanted to pay him.
  “No, that’s ____  , madam.” he said, “I was just helping someone in need. If you really want to pay me back, I hope you ____ see someone in trouble, please give him a hand.” A few minutes later, the lady saw a shabby house by the road. She  ____  Robert's words, so she stopped. The hostess warmly asked her in. The lady could see that was a ____  family and they needed help. When the hostess was making tea in the kitchen, the lady ____ 500 dollars on the table and went away quietly. Robert came home later than before, thinking how hard their life was. Their ____  was to be born the next month but there wasn't ____  money. His wife went up to him, gave him a kiss and said softly, “Don't worry, dear! Everything’s going to be all right. A stranger has helped us out. ”
Let's always be ready to help others because helping others is helping ____  .