问题 单项选择题

献血者为A型血,经交叉配血试验。主侧不凝集而次侧凝集,受血者的血型应为

A.B型
B.AB型
C.O型
D.A型
E.A型或B型

答案

参考答案:B

解析:[解题思路] 献血者为A型血,其红细胞膜上含凝集原A,血清中含抗B凝集素。交叉配血的主侧是献血者红细胞与受血者的血清进行配合,主侧不凝集,表示受血者血清中不含抗A凝集素;交叉配血的次侧是将受血者的红细胞与献血者的血清做配合试验,次侧凝集,表示受血者红细胞膜上含凝集原B。根据交叉配血结果,受血者红细胞膜上有凝集原B,而不含抗A凝集素,可判断受血者的血型为 AB型。因为B型者血清中含抗A凝集素,O型者红细胞膜上不含凝集原B,A型血者红细胞膜上不含凝集原B,故受血者不可能是A型、B型或O型。
[命题规律] 考察“血型与交叉配血”。重点掌握。

阅读理解

When we do not understand each other’s language, we can talk with the help of signs.

A Frenchman was once traveling in England. He could not speak English at all. One day, he went into a restaurant and sat down at a table. When the waiter came, he opened his mouth, put his fingers in it and take them out again. He wanted to say, “Bring me something to eat.”

The waiter soon brought him a cup of tea. The man moved his head from side to side. The waiter understood him and took the tea away. In a moment he came with a cup of coffee and put it on the table. The man again refused his offer. He shook his head whenever the waiter brought him something to drink, for drinks are not food.

When the man was going away, another man came in. This man saw the waiter, and he put his hands on his stomach. This was enough. In a few minutes there was a large plate of meat and vegetables on the table in front of him.

So you see, we can understand the language of signs as well as we can understand the language of words.

68. A Frenchman signed to the waiter ______.

A. to translate                                    B. to tell him what he said

C. to bring him a cup of tea                 D. to ask him for food

69.   The waiter brought the Frenchman ______.

A. different kinds of drinks                 B. a large plate of meat and vegetables

C. another man to help him                 D. a piece of paper to write something on

70. By putting his hands on his stomach, the second man meant ______.

A. he was hungry                               B. he had had enough

C. he was very thirsty                         D. he had a stomachache

71. From the story, we learn that ______.

A. people can only understand the language of words

B. proper body language can help people to understand each other

C. waiters should understand body language

D. it is important to learn a foreign language

名词解释