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防止折角塞门关闭和制动机失效的卡死制度是什么？

答案

参考答案：

（1）出发列车必须按规定位置分段两侧监护送车，做到列车不开人不离；

（2）制动机试验必须安装制动机试验记录仪，按规定程序进行列车制动机试验，全部试验时，必须做到两闸两对头。

单项选择题

根据我国《建设工程质量管理条例》的规定，下列关于保修期限的表述，错误的是( )。

A．屋面防水工程的防渗漏为5年

B．给排水管道工程为2年

C．供热系统为2年

D．电气管线工程为2年
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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.

A statement made or implied in the passage is that ______.

A．attitudes can be based on the learning of falsehoods

B．a child can develop in the classroom an attitude about the importance of brushing his teeth

C．attitudes cannot easily be changed by rewards and lectures

D．the attitudes of elementary school-aged children are influenced primarily by their teachers
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