问题 单项选择题 A1/A2型题

抗结核药异烟肼是采用何种方式发现的()

A.随机筛选

B.药物合成中间体

C.组合化学

D.对天然产物的结构改造

E.基于生物化学过程

答案

参考答案:B

解析:将胺硫脲的氮原子从苯核外移到苯核上,得到了异烟醛缩氨硫脲,出乎意料的是其中间体异烟肼对结核杆菌显示出强大的抑制和杀灭作用,并且成为对细胞内外的结核杆菌均显效的抗菌药物,这使异烟肼成为抗结核药的首选药物之-。所以答案为B。

阅读理解

It’s not easy being a teenager nor is it easy being the parent of a teenager.You can make your child feel angry, hurt or misunderstood by what you say without realizing it yourself.It is important to give your child the space he needs to grow while gently letting him know that you’ll still be there for him when he needs you.

Expect a lot from your child,just not everything.Except for health and safety problems,such as drug use or careless driving,consider everything else open to discussion.If your child is unwilling to discuss something,don’t insist he tell you what’s on his mind.The more you insist, the more likely that he’ll clam up.Instead,let him try to solve things by himself. At the same time,remind him that you’re always there for him if he seeks advice or help.Show respect for your teenager’s privacy(隐私).Never read his mail or listen in on personal conversations.

Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long,tell him he can talk for l5 minutes,but then he must stay off the phone for at least all equal period of time.This not only frees up the line so that other family members can make and receive calls,but teaches your teenager moderation(节制).Or if you are open to the idea,allow your teenager his own phone that he pays for with his own pocket money or a part-time job.

小题1:The main purpose of the text is to tell parents       

A.how to get along with a teenager

B.how to respect a teenager

C.how to help a teenager grow up

D.how to understand a teenager小题2:What does the phrase "clam up" in Paragraph 2 probably mean?

A.become excited

B.show respect

C.refuse to talk

D.seek help小题3:The last paragraph is about how to teach a teenager ________.

A.to use the phone in a proper way

B.to pay for his own telephone

C.to share the phone with friends

D.to answer the phone quickly小题4:What should parents do in raising a teenager according to the text?

A.Not allow him to learn driving or take drugs.

B.Give him advice only when necessary.

C.Let him have his own telephone.

D.Not talk about personal things with him.

多项选择题