题干

下列说法中错误的是(  )

A:在冬季,剩有半瓶热水的暖水瓶经过一个夜晚后,第二天拔瓶口的软木塞时觉得很紧,不易拔出,是因为白天气温升高,大气压强变大

B:一定质量的理想气体,先等温膨胀,再等压压缩,其体积必低于起始体积

C:布朗运动就是液体分子的运动这种说法是错误的

D:晶体在熔化过程中所吸收的热量,将主要用于既增加分子的动能,也增加分子的势能

E:在轮胎爆裂这一短暂过程中,气体膨胀,温度下降

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答案(点此获取答案解析)

A,B,D

同类题4

    One afternoon, my son came home from school and asked me, “Are all people the same even if their skin color is different?” I thought for a moment, then I said, “I'll explain. Let's go to a fruit store first. I have something interesting to show you.”
At the store, I told him that we needed to buy apples. And we bought some red apples, green apples and yellow apples.
   After we got home, I told Adam, “It’s time to answer your question.” I put one of each type of apple on the table: first a red apple, followed by a green apple and then a yellow apple. Then I looked at Adam, who was sitting on the other side of the table.
   “Adam, people are just like apples. They come in different colors, shapes and sizes. See, some may not even look as delicious as others.” As I was talking, Adam was examining each one carefully.
   Then, I took each of the apples and peeled them, placing them back on the table, but in a different place.“OK, Adam, tell me which one is the red apple, the green apple and the yellow apple.”He said, “I can’t tell. They all look the same now.”“Take a bite(一口) of each one. See if that helps you tell which one is which.”He took big bites, and then a huge smile came across his face. “People are just like apples! They are all different, but if you take off the outside, they’re pretty much the same on the inside.”“Right,” I agreed. “Just like everyone has their own features but they are nearly the same.”
   He completely got it. I didn’t need to say or do anything else.
   Now, when I eat an apple, it tastes a little sweeter than before. What perfect fruit it is!