主板上有一块时钟发生器（也即时钟芯片），它一般时与主板上的另外一块芯片（）配合在一起

17，24，33，46，( )，92

A．65

B．67

C．69

D．71

下列哪种细胞损伤后可产生内因子抗体（）

A.主细胞

B.壁细胞

C.黏液细胞

D.G细胞

E.贲门腺细胞

阅读理解。

     You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you

lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you.

If the blood is too different from your own, the transfusion could kill you.

     There are four basic types of blood; A, B, AB, and O. A simple test can make sure of a person's blood type.

Everybody is born with one of these four types of blood. Blood type, like hair color and height, is received from

parents.

     The four groups must be transfused carefully. A and B cannot be mixed. A and B cannot receive AB, but

AB may receive A or B. O can give to any other group; therefore, it is often called the universal donor (万能捐

赠者). For the opposite reason, AB is sometimes called the universal recipient (接受者). However, because so

many reactions (反应) can happen in transfusions (输血), patients usually receive only salt of plasma (liquid

part of blood) until their blood can be matched as exactly as possible in the blood bank of a hospital. In this

way, it is possible to prevent the transfusion from any bad reactions.

1. People with type A blood can receive type _____. [ ]

A. AB

B. B

C. O

D. all of the three

2. If you need a blood transfusion, the best and safest blood for you is _____. [ ]

A. a mixture of type A and type B

B. a mixture of salt, plasma and type O

C. type AB

D. exactly the same type as your own

3. The phrase "universal recipient" means a person who _____. [ ]

A. can receive blood of type A or B

B. can receive blood of any other type

C. can give blood to anybody

D. cannot give blood to others

4. A good title for this article is _____. [ ]

A. Getting Enough Blood

B. Differences Between Blood Types

C. Man's Four Types of Blood

D. How to Give Blood Transfusion

5. Which of the following statement is NOT true? [ ]

A. Carelessness in a blood transfusion may lead to death.

B. AB is the mixture of A and B.

C. AB is called the universal recipient because it can receive any other group.

D. In transfusions, patients usually receive only salt of plasma at first.

《中华人民共和国安全生产法》规定生产、经营、运输、储存、使用危险物品或者处置废弃危险物品的，由有关主管部门依照有关法律、法规的规定和国家标准或者（）审批并实施监督管理。

A.行政法规

B.行业标准

C.地方性法规

由于加热炉炉管注汽量较小，为了确保减压操作平稳即使蒸汽严重带水时也不用停炉管注汽。