问题 实验题

(3分)小强最近出现面色苍白、头晕、疲乏、食欲不振、心慌等症状,医生为他做了血液化验,下表是他的血液化验单:

××医院血液化验单
姓名:张强       性别:男       年龄:15         2010年6月15日
项目测定值正常参考值
红细胞3.3×1012个/升5.0×1012个/升
白细胞7.5×109个/升(4-10)×109个升
血小板2×1011个/升(1-3)×1011个升
血红蛋白80克/升120-160克/升
根据血液化验单,医生诊断小强可能患了_________,主要是由于血液中的_______数量过少和________含量过少所致。

答案

贫血 红细胞 血红蛋白

红细胞具有运输氧气的功能,血红蛋白具有结合氧的能力,当红细胞或血红蛋白过少时,那么运输的氧气就少,这时人会出现头晕、无力的症状,即贫血。

单项选择题
单项选择题

Of all the areas of learning the most important is the development of attitudes. Emotional reactions as well as logical thought processes affect the behavior of most people.
"The burnt child fears the fire" is one instance ; another is the rise of despots like Hitler. Both examples also point up the fact that attitudes stem from experience. In one case the experience was direct and impressive; in the other it was indirect and cumulative. The Nazis were indoctrinated largely by the speeches they heard and the books they read.
The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose word they respect.
Another reason it is true is that pupils often delve somewhat deeply into a subject in school that has only been touched upon at home or has possibly never occurred to them before. To a child who had previously acquired little knowledge of Mexico, his teacher’s method of handling such a unit would greatly affect his attitude toward Mexicans.
The media through which the teacher can develop wholesome attitudes are innumerable. Social studies (with special reference to races, creeds and nationalities) , science matters of health and safety, the very atmosphere of the classroom... these are a few of the fertile fields for the inculcation of proper emotional reactions.
However. when children come to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by cajoling or scolding them. She can achieve the proper effect by helping them obtain constructive experiences.
To illustrate, first grade pupils afraid of policemen will probably alter their attitudes after a classroom chat with the neighborhood officer in which he explains how he protects them. In the same way, a class of older children can develop attitudes through discussion, research, outside reading and all-day trips.
Finally, a teacher must constantly evaluate her own attitudes, because her influence can be deleterious if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decisions as a result of objective analysis of all the facts.

The pupils’ attitudes are NOT influenced by ______.

A.their parents’ persuasion to behave properly

B.their teachers’ attitudes

C.the speeches they hear and the books they read

D.such media as social studies, science matter and classroom atmosphere