题干

以下有关热现象的说法中,不正确的是(  )

A:水沸腾时,产生的气泡在上升的过程中由小变大

B:游泳后,刚从水中上岸时感到冷,是蒸发吸热所致

C:水沸腾时,不用温度计测量就知道它的温度是100℃

D:沸水的水蒸气比沸水造成的烫伤更严重,是因为水蒸气在烫伤人时还要液化放热

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答案(点此获取答案解析)

C

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阅读理解

    A year ago, I paid no attention to English idioms, though my teacher emphasized (强调) the importance again and again. But soon, the importance of English idioms was shown in an amusing experience.

    One day, I happened to meet an Englishman on the road, and soon we began to talk. As I was talking about how I was studying English, the foreigner seemed to be astonished. Gently shaking his head, shrugging his shoulders, he said, “You don't say!” “You don't say!” I was puzzled. I thought, perhaps this is not an appropriate topic (适当的话题). “Well, I'd better change the topic.” So I said to him. “Well, shall we talk about the Great Wall? By the way, have you ever been there?” “Certainly, everyone back home will laugh at me if I leave China without seeing it. It was magnificent.” He was deep in thought when I began to talk like a tourist guide. “The Great Wall is one of the wonders in the world. We are very proud of it..” Soon I was interrupted again by his words: “You don't say!” I couldn't help asking, "Why do you ask me not to talk about it?" "Well, I didn't request you to do so, " he answered, greatly surprised. I said, "Didn't you say' you don't say?”Hearing this, the Englishman laughed to tears. He began to explain, “'You don't say' actually means 'really!' It is an expression of surprise. Perhaps you don't pay attention to English idioms.” Only then did I know I had made a fool of myself. Since then I have been more careful with idiomatic expressions. Remember: what the English teachers said is always right to us students.