脑脊液鼻漏定位方法比较准确而无明显损伤者首推：（） A．鼻内镜法 B．粉剂冲刷法 C

My grandma _____ at home. She is a housewife.   [ ]

A. work                      

B. working                    

C. works                    

D. to work

Have you ever been ill? When you are ill, you must be unhappy because your body becomes hot, and there are pains all over your body. You don’t want to work, and you stay in bed, feeling very sad.

What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can’t find them with your eyes, but you can see them with a mi­croscope(显微镜). They are very very small and there could be hundreds of them on a very small thing.

Germs are always found in dirty water. When we look at dirty water under the microscope, we shall see them in it. So your father and mother will not let you drink dirty water.

Germs can be found not only in water but also in air and dust(灰尘). If you cut your finger, if some of the dust from the floor goes into the cut(割开处), some of the germs would go into your finger. Your finger would become big and red, and you will have much pain in it. Sometimes the germs would go into all of your body, and you would have pain everywhere.

小题1:Which of the following is true?

A．If things are very very small, they are germs.

B．If things can’t be seen, they must be germs.

C．Germs are only in dirty water.

D．Germs are everywhere around us.小题2:Why don’t your parents let you drink dirty water?

A．You haven’t looked at it carefully.

B．Water can’t be drunk in this way.

C．There must be lots of germs in it.

D．Water will make you ill.小题3:What’s the main idea of the passage?

A．Germs may make us ill.

B．Germs are in dirty water.

C．Don’t drink dirty water.

D．Take care of your fingers.

在高级语言中使用SQL语句时，所有SQL语句前都必须加前缀 ______。

A．CALL SQL

B．DO SQL

C．EXEC SQL

D．GOTO SQL

报检单的“目的地”栏应填报为“长春”。( )

人体某些组织成像时，缺乏组织间影像的自然对比（如肝组织与胃肠道），人为地在体内给予某种物质来增加组织间影像的对比度，以扩大诊断范围和提高诊断准确性，这种方法称为人工对比法，所用的物质称为对比剂。

不是对比剂应具备的条件的是（）

A.无毒性，副作用少

B.使用方便

C.理化性能稳定

D.与人体组织对比强，显影清晰

E.易于在人体内存留