问题 单项选择题

有关辅酶的叙述正确的是

A.为一种高分子化合物
B.与酶蛋白结合比较疏松
C.可决定酶的特异性
D.不参与质子、电子及化学基团转移
E.一种辅酶只能与一种酶蛋白结合

答案

参考答案:B

选择题
阅读理解

阅读理解。

     A recent(最近的)report from Dazhou Daily says about 18% of Dazhou teenagers can have problems with their minds(内心,精神).Some students  become  worried  because they have to  study very hard.

Others find it difficult to get on well with people like their parents and classmates.

     Zhang Qiang, a Junior 2 student from Dazhou, could not understand his teachers in class and was doing badly  in his lessons.He was afraid of exams.When he looked  at the exam paper,  he couldn't think of

anything to write.

     Another student,  a 15-year-old girl called  Wu Yan from  Guang'an  often argued with her classmates

even her parents because of some different ideas.She became so annoyed about them that she started to hurt herself with a knife.

     However, many  students who have problems won't  go for advice or help.Some think they will  look

stupid(愚蠢的)  if they  go to see a doctor.Others  don't  want to talk about their secrets.In  order  to

solve the teenagers' problems, here is some advice:

● Talk to your parents or teachers often.

● Take part in group activities and play sports.

● Go to see a doctor if you feel unhappy or unwell.

1.It is reported that _______  students in Dazhou can have problems with theirminds.

A.most          

B.many          

C.some          

D.all the

2.From the passage we know teenagers have problems with their minds because of _______

A.their study        

B.getting on with other people

C.their hobbies        

D.A and B.

3.Wu Yan started to hurt herself with a knife because ___________   

A.she couldn't get on well with her classmates and even her parents

B.she could not understand her teachers in class

C.she was afraid of exams

D.she had no money for a new shirt

4.Why don't the students who have problems want to go for help?

A.Because they think no one will help them.

B.Because they don't want to talk about their secrets and they think it's stupid to see a doctor.

C.Because they think they can solve the problems by themselves.

D.Because they think the doctors could do nothing with their problems.

5.How many pieces of advice are given to the teenagers who have problems in this passage?

A.Two.      

B.Three.      

C.Four.      

D.Five.