When I was young, I liked to play jokes on people I knew, especially on my parents and friends. One day my mother was cooking in the kitchen and my younger brother was playing near the window. I ran to my mother and said, “My brother has fallen from the open window!” She was very worried about my brother and then I said, “Don’t worry. I’m just joking.” And my mother shouted at me, “If you do it again, I’ll punish(惩罚) you.”
One day I went swimming with my friends in the sea. I wanted to play a joke on my friends. In the beginning, I went swimming alone, and I called to my friends, “ Help me!” All my friends came to help me, only to find out that I was joking. But the next time I wasn’t joking. I swam in deep water and I was so careless that I was almost drowned(淹死). I tried my best to call my friends for help, but this time nobody came to help me. In the end, they found I was telling the truth(真话). They came and saved my life. They took me to the emergency center. From then on, I haven’t joked on anyone. I think this is the best lesson in my life.
小题1:What did the writer like to do when he was young ?
A. To fight with his friends. B. To play with his mother.
C. To play jokes on others.
小题2:How did the writer’s mother feel when she heard what he said about his brother ?
A. Interested. B. Worried. . C. Excited.
小题3: When the writer shouted “Help me!” for the first time, his friends _______ .
A. came to help him B. didn’t care about him
C. stopped to look at him
小题4:The underlined part “the emergency center” means “________” in Chinese.
A. 购物中心 B. 娱乐中心 C. 急救中心
小题5: Which of the following is TRUE according to the passage?
A. The writer’s mother was cooking when his mother fell from the open window.
B. The writer used to go swimming alone in the deep sea.
C. The writer hasn’t joked on others since he was saved by his friends.
2NO2（g），当测得N2O4转化率为33.3％时，混合气体平均式量是 （ ）