勖勉 xù miǎn

细胞因子刺激活化的巨噬细胞可产生的炎性介质是

A．血小板激活因子

B．白三烯

C．前列腺素

D．血小板激活因子、白三烯、前列腺素

E．以上均不是

（1）已知y与x-1成反比例，且当x=2时，y=3，求x=3时，y的值．

（2）已知二次函数y=ax²与一次函数y=2x-3的图象都经过点（1，m），求二次函数的解析式．

阅读理解。

     You want to know about my staying in America, right? Well, to tell you the truth, it is really an

eye-opening experience to study here.

     In China, I had English classes five times a week since fifth grade. However, I didn't know

how different textbook English could be from everyday English until I came to Hotchkiss School,

Connecticut.

     When I first studied English, I was told to say, "I am fine" when people say "How are you?" But

in the US, I found that people say, "I am good" or "I'm tired".

     One day, someone greeted me with "What's up?" It made me confused. I thought for a moment

and then smiled because I didn't know what to say.

     Since then, I have discovered more and more differences between Chinese and US cultures.

     To my surprise, US girls spend a lot of time in the burning sun to get a tan(晒黑). However, in

China, girls try every possible way to get their skin paler, or "whiter".

     I was also surprised by how hardworking US students are. In China, schoolwork is almost

everything, so we study hard and that's it. But here, a "good" student gets good grades, does a lot

of work for the public and plays sports or music.

     The kids here are so talented, and I am starting to be sorry that I gave up playing the piano at

an early age and that I have never thought about sports.

1. According to the writer, textbook English is ________ everyday English.

A. quite different from                      

B. the same as

C. more difficult than                      

D. easier than

2. A good US student spends his / her time __________ .

A. only in doing homework                

B. only on sports or music

C. only in working for the public            

D. on studies, sports or music and public work

3. Which of the following is NOT true?

A. The writer is now in US.                

B. American girls love to have white skin.

C. US students are talented and hard working.  

D. The writer regrets(后悔) that he gave up playing the piano.

4. Which is the best title for the passage?

A. My Own Travel in the US                

B. My Studying in the US

C. My Opinion about the US                

D. My Friends in the US

关于子宫的描述，下列叙述不正确的是（）

A.成年女性的子宫长7～8cm，宽4～5cm，厚4～5cm

B.子宫体与子宫颈的比例，成年人为2：1

C.子宫峡部的上端是解剖学内口

D.子宫体与子宫颈之间形成最狭窄的部分为子宫峡部

E.经产妇的子宫颈外口是圆形

设备发生下列（）情形应定为设备一类障碍

A、发电设备异常，需停机处理，虽经调度批准，但机组停用时间超过24小时的

B、脱硫系统退出运行超过24小时的

C、设备异常运行，造成机组非计划降出力50%以上，且持续时间超过24小时的

D、主要辅助设备或公用系统设备被迫停止运行、非计划检修、停止备用或计划检修延期，时间超过24小时的

E、火力发电厂设备故障，造成设备运行异常或机组被迫停止运行的