下列何项不是乌梅丸的药组（） A.细辛 B.干姜 C.人参 D.黄芩 E.黄连

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

写出下面词语的反义词。

容易—（　　） 深奥—（　　） 微弱—（　　） 爱戴—（　　）

作图题（6分）

（1）请在图甲中用作图的方法，表示人眼所能看到的档板右侧范围大小，并在此范围中打上阴影线。（用带有箭头的直线表示光线，箭头方向为光的传播方向）。

（2）如图乙所示，考古人员需要对一口古井进行清理，为了解决照明问题，准备用平面镜把太阳光反射到井里，并能垂直照亮井底。请你在图中画出符合要求的平面镜（保留作图痕迹）。

（3）如图丙，已知入射光线，请画出经凸透镜、凹透镜折射后的折射光线。

当r=0.2时，则决定系数为（）

A.2%

B.4%

C.10%

D.20%

E.40%

英国科学家指出，在南极上空，大气层中的散逸层顶在过去40年中下降了大约8公里。在欧洲上空，也得出了类似的观察结论。科学家认为，由于温室效应，大气层可能会持续收缩。在21世纪，预计二氧化碳浓度会增加数倍，这会使太空边界缩小20公里，使散逸层以上区域热电离层的密度继续变小，正在收缩的大气层至少对卫星会有不可预料的影响。这段文字的主要意思是()。

A．太空边界缩小的幅度会逐渐加大

B．温室效应会使大气层继续收缩

C．大气层中的散逸层顶会不断下降

D．正在收缩的大气层对卫星的影响不可预料