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.
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
第3题
排卵期可出现()A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
子宫内膜癌可出现()A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
宫颈息肉可出现()A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
先兆流产可出现()A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
宫颈癌可出现()A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
请帮忙给出每个问题的正确答案和分析,谢谢!
第4题
宫颈癌可出现()
A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
第5题
排卵期可出现()
A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
第6题
先兆流产可出现()
A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
第8题
子宫内膜癌可出现()
A.性交后出血
B.经间出血
C.绝经多年后阴道出血
D.停经后阴道出血
E.经前或经后点滴出血
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