什么叫厂房的上部结构，下部结构、下部块体结构？

The best way of learning a language is using it. The best way of learning English is talking in English as much as you can. Sometimes you’ll get your words mixed up and people will not understand you. Sometimes people will say things too quickly and you can’t understand them. But if you keep your sense of humor, you can always have a good laugh at the mistakes you make. Don’t be unhappy if people seem to be laughing at your mistakes. It’s better for people to laugh at your mistakes, which shows they understand what you are saying. But if they are angry with you. That may mean they don’t understand what you are saying. The most important thing for learning English is, “Don’t be afraid of making mistakes because everyone makes mistakes.”

小题1:The writer thinks that the best way for you to learn a language is ________.

A．writing

B．using it

C．listening

D．learning grammar小题2:What should you do in learning English?             

A．Be careful not to make any mistakes.

B．Write as quickly as you can .

C．Speak English as much as you can.

D．Laugh more often .小题3: When you make a mistake you should _______.

A．keep quiet

B．get angry

C．be kind

D．keep your sense of humor小题4:The story tells us :”__________”.

A．Only foolish people make mistakes

B．Few people make mistakes

C．People never make mistakes

D．There is no one who doesn’t make mistakes

学校食堂有面粉a千克，每天用去6.5千克，用了b天，剩下面粉的千克数用含有字母的式子表示是______；如果a=50，b=4，那么剩下的面粉是______千克．

胃、肠道癌发生血行转移的最常见器官是（）。

A.肺

B.脑

C.肝

D.肾

E.骨

三相交流电动机修理后，一般应做哪些检查和试验？

专业承包企业可以对所承接的工程全部自行施工，也可以将（）分包给具有相应劳务分包资质的分包企业。

A．部分非主体工程

B．部分专业工程

C．劳务作业

D．部分主体工程