问题 单项选择题

兄弟姐妹间进行器官移植引起排斥反应的物质是

A.异种抗原

B.自身抗原

C.同种异型抗原

D.异嗜性抗原

E.手术时感染的细菌

答案

参考答案:C

解析:移植可分为以下几种类型:①自体移植;②同种同基因移植;③同种异基因移植;④异种移植。兄弟姐妹之间移植属于同种异基因移植,引起排斥反应的抗原是同种异型抗原。

阅读理解

 Bill and his family has been living in the six-family building for years.All the neighbours got along fairly well with each other until recently.

An old man and his wife used to live on the second floor.Bill’s mother and the old lady were good friends.Unfortunately the lady died last month.Her husband could not live alone,so he had his grandson move over and live with him.

The grandson has become a problem to all the neighbours,especially to Bill’s family.The walls of the building are thin and he is noisy.Bill is used to peace and quiet but the young man likes to listen to the radio late at night.Sometimes friends of his visit and they make a lot of noise.That is too much for Bill’s family.

Bill’s mother once asked the old man politely if he was able to sleep well at night,but obviously the man didn’t understand what she meant.If he did and spoke to his grandson,the young man obviously didn’t listen,since things haven’t changed any.Everyone in Bill’s family agrees that something must be done though they don’t want to hurt the kind old man.

小题1:Bill’s family got angry because ________.

A.the old lady had died

B.a young man moved in

C.the old man could not live alone

D.the grandson made a lot of noise小题2:Which of the following statements is true?

A.The old man could not live without his wife’s help.

B.The old man and his wife were sometimes making trouble too.

C.Bill’s mother was kind to her neighbours.

D.Bill’s mother was the only one who likes the young man.小题3:It seems that ________to solve the problem.

A.anyone is able

B.only the grandfather is going

C.Bill’s mother is able

D.nobody is likely