下列属于生物的是（ ） A．恐龙化石 B．珊瑚 C．变形虫 D．钟乳石

振冲法在黏性土地基中的作用主要是( )。

A．振冲挤密

B．振冲液化

C．排水固结

D．振冲置换

阅读理解

     I remember that when I was in my teens,I used to go against many of the Dos and Don'ts my parents

taught me.For example,when I kept playing jazz records on the player,my father would think of such

music as making noise and replace  them with disks of classical music that I always considered extremely

dull.

     My mom and dad were also very particular about the friends I went out with,always saying that "One

rotten (腐烂) apple could ruin a whole barrel of apples". When I insisted on sleeping with my pet dog,

they immediately said NO because they thought that I would be bitten by fleas (跳蚤).

     These are just a few examples of many of the things that I thought my parents were unreasonable

about.Today,however,I am a father of a boy of sixteen,and I find that I,too,am pressuring my son with a

lot of rules that he seems to find hard to accept.The other day,I noticed that my son's hair was too long,

so I told him to go to the barber's and get it cut short.Usually,he is fairly obedient,but this time he put_his_

foot_down."What's wrong with my long hair?I don't think you have the right to order me to cut it short,

even if you're my father!"

     When I was a boy,if I had spoken in such a way to my father,he would have taught me a good lesson.

But now we are living in a world with more freedom.My son's insistence on wearing his long hair was only an example of the generation gap that existed between us.So I tried to be more understanding and now

he still wears his long hair.

1. The writer's parents thought it proper for him to________.

A. sleep with his pet dog

B. listen to jazz

C. be careful about making friends

D. wear long hair

2.  Which of the following is true?

A. The writer gave more freedom to his son.

B. The writer's son often went against him.

C. The writer always obeyed his parents as a child.

D. The writer liked wearing long hair.

3. The underlined phrase "put his foot down" in the third paragraph means ________.

A. obeyed  

B. insisted  

C. accepted  

D. left

4. The writer thinks that________.

A. parents should be more strict with their children

B. no generation gap exists between parents and children

C. parents have the right to order their children

D. parents should show more respect to their children

吉尔福特认为创造性思维的核心是______。

下列哪一项不属于附睾炎的声像图所见（）。

A.附睾头肿大

B.附睾强回声伴声影

C.附睾尾肿大

D.化脓时可呈无回声

E.附睾正常大小

电机单相运转会（）

A、烧电机

B、损坏减速机

C、对电机无损坏