问题 选择题

禁止近亲结婚的原因是(  )

A.防止遗传病基因的变异

B.防止遗传病的传播

C.减少遗传病发生的几率

D.杜绝遗传病的发生

答案

答案:B

题目分析:近亲是指直系血亲和三代以内的旁系血亲.我国婚姻法已明确规定,禁止直系血亲和三代以内的旁系血亲结婚.原因是近亲带有相同隐性遗传致病基因的可能性较大,近亲结婚所生的孩子患有遗传病的机率大,如近亲结婚时所生的子女中,单基因隐性遗传病的发病率比非近亲结婚要高出7.8~62.5倍;先天畸形及死产的机率比一般群体要高3~4倍.孩子智力下降,并患有许多先天性疾病如先天愚型病,其危害十分显著.因此禁止近亲结婚可以减少后代得遗传病的可能性.可见B符合题意.故选:B

完形填空

(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Is there anything more important than health? I don’t think so. “Health is the greatest wealth,” wise people say. 小题1: 

If you have a headache, toothache, backache, or bad pain in the stomach, if you complain of a bad cough, or if you suffer from high or low blood pressure, I think you go to the doctor.

The doctor will examine your throat, test your blood pressure, take your temperature, sound your heart and lungs, check your teeth or have your chest X-rayed. ___小题2:   The only thing you have to do is to follow his advice.

   小题3:   

An old gentleman came to see the doctor. The man was very ill. He told the doctor about his weakness, memory loss and serious problems with his heart and lungs. The doctor examined him and said there was no medicine for his disease. He told his patient to go to a quiet place for a month and have a good rest.  小题4:   In other words, the doctor advised him to follow the rule: “Eat at pleasure, drink with measure and enjoy life as it is.” The doctor also said that if the man wanted to be well again, he shouldn’t smoke more than one cigarette a day.

A month later the gentleman came into the doctor’s office.___小题5:He thanked the doctor and said that he had never felt a healthier man.

“But you know, doctor,” he said, “it’s not easy to begin smoking at my age.”

A.He also advised him to eat a lot of meat, drink two glasses of red wine every day and ake long walks.

B.You can’t be good at your studies or work well when you are ill.

C.After that he will advise some treatment or some medicine.

D.All these will cost a lot of money. E. He looked cheerful and happy.

F. He was more worried about his illness.

G. Speaking about doctor’s advice, I can’t help telling you a funny story.

单项选择题