小雪家南面78米是超市，北面689米是学校，早晨小雪从家出发，先到超市买铅笔，然

解下列不等式

（1）3≤|5-2x|＜9

（2）|x-2|+|x+3|≥4．

按一定专题对相关技术图纸、工程图样进行选择，配以必要的数据或文字并加以编排而成的一种科技档案参考资料是（）。

A、图集图册

B、数据统计汇编

C、专题著述

D、企业年鉴

优先股资金成本率Kp的计算公式为（）。

A.Kp＝i（1—T）／（1—f）

B.Kp＝i（1—T）

C.Kp＝i／（1—f）+g

D.Kp＝i／（1—f）

School education is very important and useful. Yet no one can learn everything from school. A teacher, no matter how much he knows, he can not teach his students everything they want to know. The teacher’s job is to show his students how to learn. He teaches them how to read and how to think. So much more is to be learned outside school by the students themselves.

It is always more important to know how to study by oneself than to learn some facts or a formula by heart. It is actually quite easy to learn a certain fact in history or a formula(公式) in mathematics. But it is very difficult to use a formula in working out a maths problem. Great scientist, such as Einstein, Newton and Galileo, didn’t get everything from school. But they were all so successful and invented so many things for men. They worked hard all their lives, wasting not a single moment. They would ask many questions as they read and they did thousands of experiments.

小题1:According to the passage, a good teacher should be one who is to_________.

A．help his students to gain a good memory.

B．train his students’ ability to learn

C．teach his students everything he knows

D．have his students studying long hours小题2: If a student want to learn better, the most important thing for him to do is_______.

A．to learn all the useful facts and formula by heart

B．to do everything as his teacher have said in class

C．to absorb (吸收) as much knowledge from his teacher as possible

D．to think more while he is studying小题3:The main reason for the success of the great scientists is that________.

A．the teachers who had taught them were all experienced.

B．they used to work and study without a moment’s rest.

C．they had received more schooling than other people

D．they know how to study and worked hard小题4:What’s the good advice the writer gives us?

A．We can learn better without teachers

B．We should do more asking and thinking while studying

C．We should pay enough attention to classroom

D．Book knowledge is little use

影响抗原抗体反应的因素有（）

A.电解质，pH和反应体积

B.抗原抗体的浓度，反应体积和温度

C.电解质，pH和温度

D.温度，pH和反应体积

E.温度，反应体积和pH