题干

关于物体的内能,下列说法正确的是(   )

A:温度相等的1 kg和100 g的水内能相同

B:物体内能增加,一定要从外界吸收热量

C:温度为0℃的物体没有内能

D:在相同物态下,同一物体温度降低,它的内能会减少

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答案(点此获取答案解析)

D

同类题1

A栏是五项有礼貌的请求或建议,B栏是七项应答.请将它们匹配起来,并将答案的字母编号填写在题前的括号内。

    A

    B

(1)Hi, Nancy. Could you please wash the dishes after dinner?____ 

(2)Mum, could I go to the movies with my cousin Sally and Cindy? I have not seen a movie for long.____ 

(3)Is this your dog, sir? This is a dangerous dog. It may hurt others. Please, keep it at home and take good care of it.____ 

(4)Weekend is coming. Are you free then, Mr. Green? Could you go fishing with us?____ 

(5)I just cut my left finger. Blood is running down. Could you drive me to the hospital to see the doctor, Mr. Green?____ 

A. Sure, that should be OK. But you must be careful on the way because there is so much ice and snow on the road. And go back home soon after the movie.

B. Of course. I am glad to help you with the housework and cooking. Then we can have a big dinner together.

C. I'd love to. But I have to stay at home and look after my sister. My parents are both at work. Fishing is really fun. I am sure to go with you next weekend.

D. Sorry, I am afraid I can't go to your party on Saturday. My uncle is coming to see me that day. I have to pick him up at tile airport and show him around my hometown.

E. OK, Dad. We don't have many dishes to wash today. It can only take me about five minutes to wash them.

F. Let me see. It's really a deep cut. Let's go to the hospital quickly. I am afraid the doctor may operate on your finger.

G. Thanks for telling. My dog once got a special training. In fact, it is friendly. It won't attack  people unless he is attacked.