It was 4 o'clock in the morning when I r

Every minute has been made full ______ of by the girls ______ knowledge about etiquertte.

A．using; learning

B．use; to learn

C．to use; to learn

D．use; learning

三角形的外心是指[ ]

A.三角形三角平分线交点

B.三角形三条边的垂直平分线的交点

C.三角形三条高的交点

D.三角形三条中线的交点

下列选项中不符合煤气制气厂选址原则的是()。

A．厂址应具有方便、经济的交通运输条件

B．厂址宜靠近生产关系密切的工厂，并为运输、公用设施、三废处理等方面的协作创造条件

C．厂址应有良好的工程地质条件和较高的地下水位，以使煤气制气厂有良好的环境

D．厂址不应设在受洪水、内涝威胁的地带

单核吞噬系统

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