北宋的“市”不同于唐朝的突出表现是 A．出现草市 B．出现纸币 C．出现商业都市

阅读理解。

     Wang Bing's father began smoking when he was a freshman(大学一年级学生) in college.

His friend passed him his firstcigarette. He has now been smoking for more than 30 years. It's

a classic example of how young people are introduced tocigarettes, except that nowadays smokers

develop their habit at aneven younger age.

     It has become a major concern(担忧) in China that many teenagers begin to smoke. A survey

showed that 22.5% of the middle school students questioned had tried smoking and 15.8% of

them smoked regularly.

     For many teenagers, smoking is a symbol of being an adult, independence, maturity(成熟)

and attractiveness because the images who they love best often smoke on screen.

     The social environment also plays an important role inattracting teenagers to smoking. They

are used to seeing theirelders, especially male family members, smoking at home. Many ofthem

imitate adult behavior and become new smokers.

     To increase the price of cigarettes is an effective way to reducethe number of young smokers,

as teenagers have limited money tospend on them.

     Another way is to educate the teenagers to voluntarily refuse cigarettes. A survey shows that

92.5% of the students know smoking will be bad for their health. If we persuade them in aproper

way, most of them may give up smoking.

     All in all, the society, the government, the school and thefamily should join together to take the

responsibility for ananti-smoking (禁烟) campaign aimed at teenagers, not just to put empty slogans

and warnings on cigarette packs.

1. The writer uses the first paragraph to _____.   

A. tell the readers a story of a smoker

B. introduce the topic of the passage

C. introduce the college life of Wang Bing's father.   

2. What's the main idea of this passage?   

A. The teenagers think smoking is a symbol of being an adult andindependence.

B. The social environment encourages the teenagers to smoke.

C. The teenagers should be educated to refuse to smoke.

D. The teenage smoking has become a serious problem in China.   

3. What does the word "imitate" in Paragraph 5 mean in Chinese?   

A. 指责

B. 忍受

C. 模仿

D. 支持  

4. From the underlined part of the last sentence of this passage, we can infer(推断) that the writer thinks putting slogans and warningson cigarette packs is _____ to solve the problem.  

A. not enough

B. of no use

C. of great help

D. of greatimportance

在天文学中，常用“光年”这个单位，光年就是光在一年内通过的路程，那么光年是 [ ]

A、时间单位　 　

B、长度单位　 　

C、速度单位　 　

D、质量单位

防火墙上的配置信息如下图所示。要求启动HTTP代理服务，通过HTTP缓存提高浏览速度，代理服务端口为3128，要使主机PC1使用HTTP代理服务，其中“地址”栏中的内容应填写为 (9) ,“端口”栏中内容应填写为 (10) 。

金属防腐中涂层保护的种类有（）。

A.金属保护层

B.非金属保护层

C.涂料保护层

D.机械保护层

使用代码在程序运行期间，把图形文件装入图片框或图像框中所用的函数是______。