Do you know blood types?
Special care must be taken in selecting new blood for a badly injured person, who would be killed by the transfusion (输血) if the blood is too different from his own.
There are four basic types of blood A. B. A B. and O. Blood type, like hair and height, comes from parents. Basically, A and B can not be mixed. AB, sometimes called the universal recipient (万能受血者), may receive A or B,. O type, often called the universal donor (万能输血者), gives his blood to any other group. Patients usually receive nothing, but salt or plasma (血浆) until their blood can be matched as exactly as possible in the blood bank of a hospital. There is a relationship between your blood type and your nationality (国籍). Among Europeans, about 42 % have type A while 45 % have type O. The fewest is the type B.
小题1:Which of the following show the correct relationship in blood transfusion ("→"means giving blood to...)?
A．
B．
C．
D．小题2:Usually person who has been injured and lost too much blood should be given a blood transfusion______.
A．after he receives salt and plasma
B．before he feels uncomfortable
C．when the new blood fits his body
D．as soon as accident happens小题3:From this passage we can know that among Europeans ______ 13 % have the type B.
A. about B. no more than C. less than D. at most
小题1:D
小题2:C
小题3:C
题目分析：本文讲述了血型方面的有关知识，可知AB是万能受血者；O是万能输血者。
小题1:D 推理题。根据第二段前三行There are four basic types of blood A. B. A B. and O. Blood type, like hair and height, comes from parents. Basically, A and B can not be mixed. AB, sometimes called the universal recipient (万能受血者), may receive A or B,. O type, often called the universal donor (万能输血者), gives his blood to any other group.可知AB是万能受血者；O是万能输血者。故D项内容正确。
小题2:C 细节题。根据第二段4,5行Patients usually receive nothing, but salt or plasma (血浆) until their blood can be matched as exactly as possible in the blood bank of a hospital说明直到血型相配以后才能输血。故C正确。
小题3:C 细节题。根据文章最后一句Among Europeans, about 42 % have type A while 45 % have type O. The fewest is the type B. 说明少于13 %的人是B型血。故C正确。
点评：本文讲述了血型方面的有关知识，文章基本上是考查细节题，对此类题型考生可以首先从问题中找到关键词，然后以此为线索，运用略读及查阅的技巧在文中迅速寻找这一细节，找到后再把这一部分内容仔细阅读一遍，仔细比较所给选项与文中细节的细微区别，在准确理解细节的前提下，最后确定最佳答案。