问题 选择题

下列现象中,属于光的折射现象的是(  )

A.在太阳光的照射下,地面上出现大树的影子

B.教室里的黑板反光

C.人在河边看见“白云”在水中飘动

D.盛了水的碗,看上去好像变浅了

答案

A、在太阳光的照射下,地面上出现大树的影子是光的直线传播形成的;

B、教室里的黑板反光,是因为黑板光滑,发生了镜面反射;

C、人在河边看见“白云”在水中飘动,是天空中的白云在水面成像,是由光的反射形成的;

D、盛了水的碗,看上去好像变浅了,变浅的碗底是碗底反射的光经水面折射形成的虚像.

故选D.

单项选择题
阅读理解

阅读理解。

     Jeanne Calment, a French woman, became a record breaker on 17 October of 1995, when at the age of

120 years and 238 days, she became the longest-lived human being on record. A Japanese man died in 1986

at the age of 120 years and 237 days.

     Jeanne Calment lives in a small old people's home in the south of France; her husband, her only child and

her grandson have all died. She is nearly blind and deaf and is always in a wheelchair, but her doctor describe

s her as being more like a 90-year-old in good health than someone of 120. She still has a lively sense of humor. When asked on her 120th birthday what she expected of the future, she replied: A very short one. She also

remarked that she thought the good Lord had forgotten all about her.

     So what is the key to a long life? According to some doctors, diet, exercise and no smoking are the three

important factors. Jeanne Calment has followed two of the tips. She has always eaten a healthy diet, and she

used to do exercises every day until she broke her leg at the age of 115. However, until recently she drank two

glasses of strong red wine a day, and she does smoke(now only a little). Besides, Jeanne Calment might have

got very good genes (基因) from her parents. Her father lived to the age of 94 and her mother to 86.

      A local lawyer bought her house when she was 80 under an agreement that he would pay her some money

every year until her death. It must have seemed a good move at the time, but so far the lawyer has paid her at

least three times the value of the house. Every year on her birthday Jeanne Calment sends him a card saying:

Sorry, I'm still alive!

1. How does Jeanne Calment feel about her old age?

A. She is miserable and unhappy.

B. She is cheerful and humorous.

C. She would like to live much longer.

D. She feels she is going to die very soon.

2. Jeanne Calment owes her good health and long life to ______.

A. smoking only a little every day

B. her giving up smoking and drinking

C. drinking two glasses of strong red wine every day

D. the good genes from her parents, a healthy diet and some exercises

3. Why does Jeanne Calment say"Sorry, I'm still alive" to the local lawyer every year on her birthday?

A. Because she had an agreement at 80 with the lawyer which was to her advantage.

B. Because she has asked the lawyer to pay her more rent than they first agreed.

C. Because the lawyer has paid her much more money than the value of the house.

D. Because the house she sold to the lawyer isn't worth the money he has already paid.