在抽样推断中应用比较广泛的指标是（）A、全距 B、平均差 C、标准差 D、标准差系数

Your junior high school years are coming to an end. After the big exam, most of you will go on to study in a senior school. What are you expecting from senior high school? Let’s hear some teen readers talk about it.

Zhou Zhijie, 15, from Shanghai:

I have heard that although Senior 3 is a hard year, Senior 1 and Senior 2 are less stressful. I hope there’ll be time then to enjoy sports. There will be plenty to see. Especially, the World Cup in Brazil is coming. We can watch football matches. I’m sure I’ll really enjoy it.

Jin Xi, 16, from Harbin, Heilongjiang:

I really enjoy science. I visit many science exhibitions. I am interested in UFOs, too. I’m crazy about making model planes, although I’m not very good at it because I don’t really have enough scientific knowledge. I’ll be learning more science in senior high school. In a word, sometime in the future I’m going to build an excellent model plane!

Wang Yaling, 15, from Xiamen, Fujian:

I hope I can be taller in senior high school. I’m only 155cm. Many people grow faster in senior and I hope I will, too. I want to be 162cm. But I’m not sure about that, since most girls in my family don’t grow taller than 160cm. I hope I’m different.

Zhang Fang, 15, from Hebi, Henan:

I expect that I’ll make more friends in senior high school. I study in a middle school in the country. Most of my classmates live nearby. In senior high school, I’ll meet different people from different areas. I hope I can learn new things from them.

根据材料内容选择最佳答案，并将其标号填涂在答题卡的相应位置。

小题1:It seems that ______ has a special interest in sports.

A．Zhou Zhijie

B．Jin Xi

C．Wang Yaling

D．Zhang Fang小题2:Jin Xi believes that it needs ______ to make an excellent model plane.

A．a quite long time

B．a lot of scientific knowledge

C．knowledge of UFOs

D．help from senior teachers小题3:Wang Yaling and Zhang Fang ______.

A．are from one city

B．have a similar dream

C．have the same age

D．have a similar problem小题4:The underlined word “stressful” in the first talk probably means “making one feel______.”

A．busy and nervous

B．free and easy

C．unsuccessful and nervous

D．safe and happy小题5:The students in the passage are talking about______.

A．their hobbies

B．their experiences

C．their schools

D．their wishes

经后小腹隐隐作痛，月经量少，色淡，腰膝酸楚，头晕耳鸣，舌淡，苔薄，脉沉细。治宜（）

A.补肾益精，养血止痛

B.补气养血，调经止痛

C.温经养血，调经止痛

D.行气活血，调经止痛

E.温经扶阳，养血调经

患者女，18岁，1型糖尿病，两天来出现恶心，面潮红，呼吸深快，渐发生神志模糊以至于昏迷。

糖尿病酮症酸中毒的诱因不包括（）

A.胰岛素使用不当

B.严重感染

C.急性应激状态

D.手术

E.妊娠和分娩

F.大量饮水

G.便秘

2009年2月15日是《中华人民共和国社会保险法（草案）》向社会公开征求意见的截止日期，一个多月以来，各地人民群众不断通过网络、报刊等媒体积极提出意见，截至2月15日，共收到各地意见6.8万余条。这反映了：（）。

A.公民平等履行义务的责任心增强了

B.公民行使政治权利、参与政治的意识不断提高

C.我国公民之间实现了事实上的平等

D.公民个人利益与国家利益是完全一致的

简述计算机网络信息安全中，包过滤防火墙技术的检查内容。