问题 单项选择题

下列是某生物体中糖类的某些变化,下面的说法不正确的是()淀粉→麦芽糖→葡萄糖→糖原

A.此生物一定是动物,因为能合成糖原

B.淀粉和糖原,都属于多糖

C.此生物一定是动物,因为能利用葡萄糖

D.麦芽糖为双糖,葡萄糖为单糖

答案

参考答案:C

解析:

糖原只存在动物体内,故A正确。淀粉为植物多糖,糖原是动物多糖,故B正确。不管动物或植物,都能利用葡萄糖,故C错。麦芽糖为双糖,葡萄糖为单糖,故D正确。

考点:本题考查糖类相关知识,意在考查考生能理解所学知识的要点,把握知识间的内在联系能力。

阅读理解

阅读理解。

     Danny was just tired about the way things were going. His mum came to school and talked on and on about Rick Jackson. It seemed that she would never stop talking. "Somebody's got to stop that boy!" she was shouting. " Rick's troubling everybody in the neighborhood. And he loves to pick on little boys like Danny. "

     Mrs Green, Danny's teacher, was concerned a lot. "I didn't know that Danny was being picked on," she said. " He's never said anything about this to me ! "Mrs Green looked at Danny. "How long had this been going on?" she asked. Danny could only shake his head and look at the floor. He knew if he said a word about this, he would have trouble at school.

     Danny hadn't said anything about the problem because he wanted to do things with the boys in the neighborhood. After all, most of them were nice to him. He hated to leave the gang just because of Rick. Maybe the time had come to find new friends. He felt it hard to make up his mind.

1. We learn_____ from the reading that.

A. Danny was not a good student

B. Danny's mother talked too much about the school

C. Danny's teacher knew something about Danny's problem before

D. Danny wanted to get away from Rick

2. When Danny's mother came for Mrs Green,the matter was nowto Mrs Green?

A. serious

B. common

C. untrue

D. similar

3. Danny now____.

A. was tired of the school and his friends

B. had no friends at all

C. was not sure what he would do with the problem

D. made some new friends in the neighborhood

4. Danny didn't say anything about the matter to Mrs Green because?  

A. she had known it

B. the other boys would tell her

C. he didn't want to be in trouble

D. his mother didn't want him to say it

5. The word " gang" in the reading means" _____".

A. a place for boys to play games

B. a group of young people

C. a school bus for children to and from school    

D. the teacher's office

问答题 简答题