属牙源性囊肿的是（） A.Gorlin囊肿 B.牙瘤 C.单纯性骨囊肿 D.根尖周囊

计算下面各题，并验算．

610÷86=

857÷23        

264×82．

We live in the computer age. People use computers to do much of their work. But few people know how to look after them. Remember the following when you use your computer:

① Keep your computer in a cool ,dry room. Too much or too little heat is bad for computers. Damp (潮湿) is also bad for them.

② Do not let people smoke near your computer. Smoke of all kinds is very bad for many parts of a computer.

③ Do not eat or drink when you are near your computer. Pieces of food and a little water in the keyboard are also bad for a computer.

小题1:Computers can ____ people to do a lot of work.

A. help      B. make        C. use

小题2:Few people know how to_____ their computers.

A. look for   B. take care of   C. look at

小题3:A computer works well at a temperature of _____.

A. 0℃       B. 35℃        C. 20℃

小题4:Is smoking good or bad for many parts of a computer?

A. good      B. bad         C. I don’t know.

小题5:A dirty screen or a very bright screen is ______ for your eyes.

A. helpful     B. good        C. bad

经济能力或支付能力不同的人应当缴纳不同的税收，能力强的人应该缴纳更多的税收，以不同的方式对待条件不同的人，即体现财政公平中的( )。

A．起点公平

B．过程公平

C．横向公平

D．纵向公平

根据《民用爆炸物品安全管理条例》（国务院令第466号）于2006年，国家建立民用爆炸物品信息管理系统，对民用爆炸物品实行（）管理，监控民用爆炸物品流向。

A.统一

B.报审

C.专人

D.标识

在应用振冲碎石桩加固地基时，下述哪项意见是错误的？（）

A.采用碎石桩加固砂性土地基，具有较好的抗液化作用

B.采用碎石桩加固砂性土地基，主要是振密、挤密作用，增加桩长对提高承载力意义不是很大

C.采用碎石桩加固饱和黏土地基，主要是置换作用，为了提高承载力，可通过增加桩长来实现

D.采用碎石桩加固饱和黏土地基，工后沉降往往偏大，应慎用