问题 多项选择题

石灰稳定土基层的强度的形成主要是石灰加入土中后,发生以下哪几种作用( )。

A.离子交换作用

B.碳酸化作用

C.结晶作用

D.火山灰作用

E.干燥作用

答案

参考答案:A,B,C,D

解析:答案是ABCD,石灰稳定土基层的强度的形成主要是离子交换作用、碳酸化作用,结晶作用和火山灰作用,干燥作用在基层强度形成中影响较小。

填空题

阅读短文,根据首字母提示填入适当的词。

     Young people are often unhappy when they are with their parents. They say that their parents don't

1. u_______ them. They often think their parents are too strict 2. w_______ them. Parents often find it

difficult to win their 3. c_______ trust, and they seem to forget how they themselves felt when they

were young. 

     For example, young people like to do things without much 4. t_______. It's one of their ways to show

that they grow up and they can solve any difficult 5. p_______. But older people always think 6. m than

young people. Most of them plan things ahead and don't like their plans to be 7. c_______, so when you

want your parents to let you do something, you will succeed easily if you ask before you really start doing it. 

     Young people often make their parents angry by the 8. c_______ they wear, the music they enjoy and

something else. But they don't mean to cause any trouble. They just want to be cut off (摆脱) from the old

people's world and they are 9. t_______ to make a new culture of their own. And if their parents don't like

their music or clothes or their ways of speech, the young people feel very sad. Sometimes instead of going

out with their parents, they just want to stay at home 10. a_______ and do what they like.

      If you plan to do something, you'd 11. b_______ win your parents over and get them to understand you,

if so, your parents will certainly let you do 12. w_______ you want to do.

1.______ 2.______ 3.______ 4.______ 5._______ 6.______

7.______ 8.______ 9.______ 10.______ 11.______ 12.______

单项选择题