在高层建筑中，为了减少制冷机组承压，一般采用（）。 A.冷媒水泵设于机组出水口

阅读理解。

     Can you swim? Do you like swimming? Yes? Well, how can you learn to swim? I think the best way is

to go into the water and learn. I'm afraid you'll never learn to swim just by reading books about swimming

or looking at others swimming. It's the same with the English study. We must practice, practice and practice.

     Listening and speaking are very important for beginners. The children in English-speaking countries first

listen to others. Then they try to imitate and speak. We can listen to English programs on radio. You may just

understand a few words. It doesn't matter. Just be relaxed, try to catch every word. Somebody may be a

good listener. But he dare not speak. He's afraid of making mistakes. You know we sometimes make mistakes

when we speak Chinese. Don't be afraid. We must be brave. If you really want to learn English well, you must

try to speak with everyone as long as he knows English. Whether you know him or not is not important, when

there's nobody to talk with, you can talk to yourself in English. It's interesting and also a good way to practice

your spoken English. Remember, the more you speak, the fewer mistakes you'll make.

     Reading and writing are more important for senior school students. First we must choose the books we're

interested in. A lot of reading will improve your language sense. This is the most important.

     Keep writing English diaries. We can also write English articles. You may even post them to English

magazines. Don't be afraid of failure. Failure is the mother of success.

     Easier said than done. Well, let's do more practice from now on. I'm sure you'll learn English well in this

way.

1. You can learn to swim by _____. [ ]

A. reading books about it

B. looking at others swimming

C. having lessons on it

D. going into the river and learning

2. We should learn English by _____. [ ]

A. listening and speaking

B. reading and writing

C. both A and B

D. swimming

3. What will you do with mistakes when you speak? [ ]

A. Don't make mistakes.

B. Study hard.

C. Try not to speak English.

D. Don't be afraid.

4. What's more important for senior school students? [ ]

A. listening

B. speaking

C. reading and writing

D. learning

5. We can listen to English _____, according to the passage.[ ]

A. by train

B. on the radio

C. every minute

D. now and then

具有开窍醒神，兼能活血化瘀作用的药物是

A．麝香
B．冰片
C．牛黄
D．蟾酥
E．苏合香

乳牙急性根尖周炎不可能的临床表现是

A．叩痛

B．肿胀

C．瘘管

D．松动

E．咬合痛

公元4世纪古希腊伟大的哲学家柏拉图在（）中提出“美是什么”的这一古老而神秘的美学问题。

关于计算机网络的基本功能，正确的是（）。

A、资源共享

B、一个计算机系统可以访问多个计算机系统

C、以上都不是

D、多个计算机系统可以访问一个计算机系统