在液压系统中,不考虑容积损失与机械损失,系统的压力决定于() A.外负载 B.液压油

题型:单项选择题

问题:

在液压系统中,不考虑容积损失与机械损失,系统的压力决定于()

A.外负载

B.液压油的流动速度

C.液压油的多少

考点:液压与气动技术液压传动与控制液压传动与控制题库
题型:单项选择题

对产妇进行母乳喂养指导,内容错误的是 ()

A.每隔3小时哺喂一次,一次1小时

B.哺喂后将新生儿竖抱拍背

C.出生后6个月纯母乳喂养

D.两侧 * * 交替哺乳

E.婴儿含接不良可以造成产妇 * * 皲裂

题型:单项选择题

慢性阻塞性肺疾病病人的营养支持特点为()

A.呼衰病人应控制葡萄糖摄入量

B.适当增加脂肪供给

C.适当增加碳水化合物供给

D.适当增加蛋白质供给

E.适量补充胰岛素

题型:单项选择题

现场心肺复苏时简单有效的人工呼吸法是()

A.仰式人工呼吸法

B.伏式法

C.举腰压背法

D.轩轾板法

E.口对口人工呼吸法

题型: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 passage specifically states that ______.

A.direct experiences are more valuable than indirect ones

B.whatever attitudes a child learns in school have already been introduced at home

C.teachers should always conceal their own attitudes

D.teachers can sometimes have an unwholesome influence on children

题型:单项选择题

食物中毒按病原物分哪几类?

更多题库