问题 填空题

潜入水中的潜水运动员能看到岸上的人,是由于光的______.岸上的人看到并不深的水,但实际水深比看到的深得多,这是由于光的______的缘故.实验证明在光反射现象和光的折射现象中光路是______的.

答案

(1)岸上的人反射的光线斜射入水中发生折射,折射角小于入射角,折射光线向法线靠近,

折射光线进入潜水员的眼睛,潜水员看到了岸上的人;

(2)水底反射的光线由水斜射入空气时,发生折射,折射角大于入射角,折射光线远离法线,向水面偏折,人眼逆着折射光线看去,认为水底在折射光线的反向延长线上,因此我们看到的水底比水底的实际位置高,所以看起来水不深;

(3)在各种光学现象中,包括光的反射与折射,光路都是可逆的;

故答案为:折射;折射;可逆.

阅读理解

阅读理解。

     When I was a teenager growing up in Russia, I wanted to leave school and have my own life. The only

way I could do this was to work in the local brick factory in my town, or get married. I was nervous when

I told my father I wanted to leave school. I thought he would say, "No! You are going to college." He took

me by surprise when he said,"OK. We'll go to the brick factory."

     Two days later, he took me to the factory. I had a very romantic idea of working in a factory.  I had

imagined everyone to be friends working together and having fun. I even imagined there would be music and

singing. I guess I had watched too many movies as a teenager.

     When we arrived at the factory gates, my father spoke to the guard and one minute later we were inside.

My father said, "Take your time. Look around." I walked around the factory looking at the building, the

workers, and listening to the noise. It was horrible. I ran back to my. father and said, "I want to go home."

     He asked me, "What do you think of the factory?"

     "It's terrible," I replied.

     "And marriage is even worse!" he said.

     I went back to school the next day thinking about studying hard so I could get into a good college. I

enjoyed studying English so I decided to major in languages at college. Thanks to my father and our trip to

the brick factory, I now work at the United Nations and my father is very proud of me. I married a very

good man and my life is much better than it would have been working in the factory!

1. The writer lived in _________ when she was a teenager.

A. Russia

B. Japan

C. China

2. At first she thought life in the factory would be _________ than in school.

A. more careful

B. more colorful

C. more beautiful

3. When she told her father that she wanted to leave school, he expressed his disagreement _________.

A. by doing nothing

B. in a special way

C. by saying nothing

4. After they visited the factory, the girl _________.

A. decided to work there

B. decided to get married

C. changed her mind

5. The underlined word "horrible" means "_________" in Chinese.

A. 糟糕的

B. 紧张的

C. 浪漫的

单项选择题