问题 选择题

在下列事例中,物体内能减少的是(  )

A.金属汤勺放进热汤后变得烫手

B.放入电冰箱中的食物温度降低

C.一块0℃的冰全部熔化成0℃的水

D.“神舟七号”飞船返回舱进入大气层后表面升温

答案

A、金属汤勺放进热汤后变得烫手,汤勺的温度升高,内能增加了.故A不符合题意.

B、放入电冰箱中的食物温度降低,内能减小了.故B符合题意.

C、一块0℃的冰全部熔化成0℃的水,虽然温度没变,但是状态变了,固态变为液态,故内能增加.故C不符合题意.

D、“神舟七号”飞船返回舱进入大气层后,和大气层摩擦生热,使表面温度升高,内能增加.故D不符合题意.

故选B.

阅读理解

I came to study in the United States a year ago. Yet, I did not know the real American society until I was injured in a car accident because after the car accident I had to see a doctor---- and go to court(法庭).

After the accident, my roommate called a doctor for me. I was very grateful and determined to repay him one day. But the next day, he asked me to pay him $200 for what he had done. I was astonished. He had good reason to charge me, he said. And if I wanted to collect money from the person who was responsible for my injury. I’d have to have a good lawyer. And only a good doctor can help me get a good lawyer. Now that he had helped me find a good doctor, it was only fair that I should pay him.

But every time I want to see doctor, I had to wait about 50 minutes. He would see two or three patients at the same time, and often stop treating one so as to see another. Yet he charged me $115 each time. The final examination report consisted of ten lines and it cost me $215.

My lawyer was all smiles the first time we met. But after that he avoided seeing me at all. He knew very well the other party was responsible for the accident, yet he hardly did anything. He simply waited to collect his money. He was so irresponsible that I decided to dismiss him. And he made pay him $770.

Now I had to act as my own lawyer. Due to my inexperience, I told the insurance(保险) company the date I was leaving American. Knowing that, they played for time,….. and I left without getting a cent.

My experience taught me two things about America: firstly, in a country like America money is everything. It is more important than friendship, honor or professional morality(职业道德). Secondly foreigners are still being treated unfairly. So when we talk about America, we should see both its good and bad sides.

小题1:The author’s roommate offered to help him because ------------.

A.he felt sorry for the author

B.he thought it was a chance to make some money

C.he knew the doctor was a very good one

D.he wanted the author to have a good lawyer小题2:The word “charge” in this passage means ----------.

A.be responsible

B. accuse

C.ask as a price

D.claim小题3:Both the doctor and the lawyer in the passage are very ----------.

A.friendly

B.greedy

C.professional

D.busy小题4:What conclusion can you draw from the story?

A.Going to court is something very common in America

B.One must very careful while driving a car

C.There are more bad sides in America than good sides

D.Money is more important than other things in America

单项选择题