单选题What is the new discovery about? A Converting A, B and AB blood types into type O blood.B A safe way of transfusing blood.C An important use of type O blood.

补充完整下面的模板定义：

template<class／／Type> ／／Type为类型参数

class Xtwo{／／由两个Type类型的数据成员构成的模板类

Type a；

Type b；

public：

Xtwo(Type aa=O，Type bb=O)：a(a．A)，b(bB){}

int Compare(){／／比较a和b的大小

if(a>B)retum 1；

else if(a==@B)@return 0；

else return-1：

f

}

Type Sum()；{return a+b；}／／返回a与b的和

Type Mult()； ／／函数声明，返回a和b的乘积

}；

template<class Type>

【 】：：Mult(){return a*b；}／／Mult函数的类外定义

What is the most important difference between the bow type anchor shackle and the D-type anchor shackle?

A.The bow type shackle provides a superior connection

B.The D-type shackle is weaker than the bow type

C.The bow type shackle is weaker than the D-type

D.The D-type shackle provides an inferior connection

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 indicate a person's blood type, which, like hair color and height, is inherited from parents. Because of substances contained in each type, the four groups must be transfused carefully. Basically, 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; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their

1、A good title for this passage is ________.

A、Getting Blood and Plasma

B、Special Blood Types

C、Human Blood Types

D、The Blood Bank of a Hospital

2、The word "hence" in line 10 means _________

A、always

B、 often

C、 therefore

D、 seldom

3、In a blood transfusion, it is easiest to find the acceptable type of blood for a person with the blood type of ________

A、A

B、 B

C、 AB

D、 O

4、The purpose of using salt and plasma before a blood transfusion is to allow time ______.

A、to test the reactions to the transfusion

B、for matching the blood to be transfused with the patient's blood

C、 for the blood to be delivered from the blood bank

D、 to select a new type of blood for the patient

5、Most Europeans have blood type _________

A、A

B、B

C、O

D、A or O

Passage Four

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 indicate a person's blood type. Everybody is born with one of these four types of blood. Blood type, like hair color and height, is inherited from parents.

Because of substances contained in each type, the four groups must be transfused carefully. Basically, 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, hence it is often called the universal donor. For the opposite reason, AB sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only' salt or plasma until their blood can be matched as exactly as possible in the blood bank of a hospital. In this way, it is possible to avoid any bad reactions to the transfusion.

There is a relationship between your blood type and your nationality. Among Europeans and people of European ancestry, about 42 percent have type A while 45 percent have type O. The rarest is type AB. Other races have different percentages. For example, some American Indian groups have nearly 100 percent type O.

48. A good title for this passage is______.

A. Getting Blood and Plasma

B. Special Blood and Colors

C. Human Blood Types

D. The Blood Bank of a Hospital

A. Result Type is optional.

B. Result Type is mandatory.

C. Result Type can be changed after it is assigned to the function activity.

D. Result Type should belong to the same item type as the function activity