人体器官移植不易成活的原因是（） A．接受者和移植者的血

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问题选择题

人体器官移植不易成活的原因是（　　）

A．接受者和移植者的血型不同

B．接受者产生排斥反应的抗原

C．接受者产生排斥反应的抗体

D．接受者的神经反应太灵敏

答案

人体具有免疫功能，但免疫并不是总对人体有益的，在进行器官移植时，患者的免疫系统会对异体器官产生排斥；这是因为患者的免疫系统将移植的器官当成了进入身体的异物---抗原进行排斥．

故选：C

阅读理解

用所给单词的适当形式填空。

What do you think my lives will be like in ten years? Maybe it's very

colorful. After 1.____ (graduate) from college ,l can begin 2. (work).

I wan to be a computer programmer, because I like working with

computers.It 3. (be) an exciting job.

Of course,l will get 4. (marry) and have a baby.I hope I have

a daughter. Girls are much quieter than boys, and they had better wear

clothes 5.____of cotton,in which they 6. (feel) comfortable and look

more beautiful.

Also,I hope 7.____(move) to New York. It's a modern city and is

less polluted than the city I live in now. The best thing is that I 8.____

(buy)a nice car and go out often with my family and friends.I want to

make a lot of money and 9.____(spend) it on vacations in some big

places. What do you think? Isn't that 10. (surprise)?

问答题

某企业2004年12月31日的资产负债表(简表)如下。
资产负债表(简表)
2004年12月31日(单位：万元)