问题 名词解释

单克隆抗体技术

答案

参考答案:用骨髓瘤细胞与经特定抗源免疫刺激的B淋巴细胞融合得到杂交瘤细胞,杂交瘤细胞既能象骨髓瘤细胞那样在体外无限增殖,又具有B淋巴细胞产生特异性抗体的能力。因此,单克隆抗体技术又称为杂交瘤技术。

单项选择题 A1/A2型题
阅读理解

As you grow older, you’ll be faced with some challenging decisions—like whether to cut class or try cigarettes.Making decisions on your own is hard enough, but when other people get involved and try to pressure you one way or another it can be even harder.People who are your age, like your classmates, are called peers.When they try to influence how you act, to get you to do something, it’s called peer pressure.

Peers can have a positive influence on each other.Maybe another student in your science class taught you an easy way to remember the planets in the solar system.Maybe you got others excited about your new favorite book, and now everyone’s reading it.These are examples of how peers positively influence each other.

Sometimes peers influence each other in negative ways.For example, a few kids in school might try to get you to cut class with them; your soccer friend might try to convince you to be mean to another player and never pass him the ball.

It is tough to be the only one who says “no” to peer pressure, but you can do it.Paying attention to your own feelings and beliefs about what is right and wrong can help you know the right thing to do.

You’ve probably had a parent or teacher advising you to “choose your friends wisely.” Peer pressure is a big reason why they say this.If you choose friends who don’t cut class, smoke cigarettes, or lie to their parents, then you probably won’t do these things either, even if other kids do.

If you continue to face peer pressure and you’re finding it difficult to handle, talk to someone you trust.Don’t feel guilty if you’ve made a mistake or two.

小题1:For whom is the passage most probably written?

A.Students.

B.Parents.

C.Teachers.

D.Doctors.小题2:In the last three paragraphs, the author mainly_____.

A.explains why friendship is so important

B.gives advice on how to deal with peer pressure

C.discusses how peers influence us

D.shows how to make more good friends小题3:Which of following may help handle peer pressure?

A.Spending more time with classmates.

B.Taking up more relaxing hobbies.

C.Choosing friends with no bad habits.

D.Helping others who are in trouble.小题4:What is the topic of the passage?

A.Friendship.

B.Making decisions

C.Self-confidence

D.Peer pressure