问题 单项选择题

胆汁中含量最高的固体成分是______

A.黏蛋白
B.无机盐
C.胆色素
D.胆固醇
E.胆汁酸盐

答案

参考答案:E

解析:本题主要考查的知识点是胆汁中含量最高的固体成分。
肝胆汁和胆囊胆汁的化学组成基本类似,其中含量最高的固体成分是胆汁酸盐,占固体成分的一半,其次为黏蛋白、无机盐和胆色素、胆固醇、磷脂等。

阅读理解

阅读理解。阅读短文,从A、B、C、D中选出最佳答案。

     It is easier to go downhill than to climb uphill. So it is easier to fall into bad habits than into good ones.

     Bad habits do not come suddenly. They come little by little without one being aware of their danger.

 School boys first pick up little bad habits in school and on the street. When they can't write their lessons,

  they copy from their schoolmates. If they see bigger boys smoking, they also want to learn to smoke. If

 they see their friends gambling they want to gamble. When they get bigger, the habits become stronger and

  stronger so that they can no longer get rid of them. From copying they learn to steal, from gambling, they

 learn to cheat. At last they become suspected by everybody. How necessary it is that we get rid of the

 bad habits in the beginning!

1. It is easier to fall into ______than into________.

    A. good habits, bad habits

    B. bad habits, good ones

    C. bad habits, good one

2. Bad habits come________.

    A. suddenly  

    B. little by little

    C. faster and faster

3. Where do schoolboys pick up little bad habits first?

    A. In school

    B. On the street  

    C. in school and on the street

4. When schoolboys get bigger, their bad habits become_______.

    A. stronger and stronger

    B. weaker and weaker

    C. better and better

5. It is important for us_________.

    A. to copy with them

    B. to learn to steal and cheat

    C. to get rid of the bad habits in the beginning

选择题