某地春节斯间将举办庙会，其承办单位现已制定相应的灭火和应急疏散预案，在活动举办前进行

阅读理解。

     Students should dress well at school. This is because schools are places where students study. Students

shouldn't be dressed fashionably or strangely. That is thought of as impolite behavior at school. So many

schools have their own school uniforms. In general, the price is cheaper than that of common clothes in

markets. The colors and styles between boys' and girls' are different. And each uniform has the school name

where the student studies. Many students think they look very nice.

     However, some schools also allow students to choose other clothes they like. But those who wear other

clothes must obey the school rules about clothing at school. The following are rules from Zhongshan Middle

school.

    * Clothing must cover shoulders and backs.

    * No halter tops (三角背心) are allowed.

    * Skirts must be long enough to cover girl's knees. Skirt straps (裙带) must be as wide as three fingers.

    * Shorts must be at least as long as where your finger tips are when your arms are straight by your side. 

    * Sleeveless (无袖) shirts are only OK for boys.

1. Why can't students wear fashionable clothing at school?

A. Because fashionable clothing looks beautiful.

B. Because fashionable clothing is strange.

C. Because fashionable clothing has a different color from school uniforms.

D. Because students will be thought of impolite.

2. When we see a student's school uniform, we may know ______.

A. where the school is

B. where the student lives

C. what the teacher's name is

D. which school the student studies at

3. According to the passage, we can know that ______.

A. some schools allow students to wear common clothes

B. school uniforms are more expensive than common clothes in markets

C. both boys and girls can wear halter tops at Zhongshan Middle School

D. at Zhongshan Middle School, girls are required to wear sleeveless shirts

4. Which picture shows good manners at Zhongshan Middle School?

       A               B                  C                D

5. The passage mainly talks about ______.

A. sleeveless shirts

B. rules of dressing in schools

C. fashionable clothes

D. different school uniforms

21世纪高科技的主流是

A．信息技术

B．纳米技术

C．生命科学技术

D．空间科学技术

一次风率指（）占进入炉膛（）的百分比。

预防泌尿系结石的护理宣教有

A．饮白酒防石

B．多吃菠菜

C．多饮浓茶

D．学会测尿pH值及尿比重

E．取石手术后常进行重体力劳动

调度自动化主站系统挂牌及告警等功能正常，但“天文钟通道或转发网络通信中断”，该故障属于（）

A.SCADA类故障

B.前置类故障

C.应用类故障

D.网络类故障