在填料密封中,由于柔性石墨填料的摩擦系数较大,自润滑性能较差,因此其使用寿命较短,泄

题型:判断题

问题:

在填料密封中,由于柔性石墨填料的摩擦系数较大,自润滑性能较差,因此其使用寿命较短,泄漏量大。

考点:汽油加氢装置操作工考试初级汽油加氢装置操作工考试初级汽油加氢装置操作工考试题库
题型:判断题

小利在家里开着空调看电视,当妈妈把电饭锅插头插进插座时,家里的自动空气开关“跳闸”了。“跳闸”的原因可能是电饭锅插头内部发生________,也可能是电路中用电器的________过大。

题型:判断题

关于在OSPF协议中Hello报文的时间间隔,以下说法正确的是()。

A.缺省情况下,Broadcast、NMBA类型接口发送Hello报文的时间间隔为10秒

B.缺省情况下,P2P、P2MP类型接口发送Hello报文的时间间隔的值为30秒

C.取值范围为0~65535

D.可以通过命令来修改时间间隔,该值越小,发现网络拓扑改变的速度越快

题型:判断题

作用在制动缸活塞上的压缩空气推动活塞,由活塞杆传出的力称为()。

A、制动缸压力

B、活塞压力

C、制动压力

D、制动原力

题型:判断题

测细胞分子量()

A.Westernblotting

B.ELISPOT

C.H-TdR掺入法

D.细胞毒试验

E.细胞凋亡试验

题型:判断题

Questions 6-10 are based on the following passage.
The term control is highly—and unjustifiably—unpopular. Some of its unpopularity can be traced to educational and philosophical writings that have addressed issues of freedom, self- determination, self-worth, individuality, and other humanistic concerns—concerns often equated with liberal and permissive child-rearing and educational methods. They are the concerns that define the spirit of these times. No teacher wants to be nonliberal and restrictive. And there is little doubt that the deliberate exercise of control is restrictive. Is control therefore unethical
There is, of course, no simple answer, ff there were, there would be little controversy, and behaviorists and humanists would have much less to disagree about.
Consider, first, that control is not only inevitable but also necessary. There is no doubt that teachers, by virtue of their position and by virtue of their duties, have control. Indeed, it is not at all unreasonable to insist that the exercise of control is one of the teacher’s most important duties. We are not speaking here of a fear-enforced control that might have been characteristic of some of yesterday’s schools. Control can be achieved, or at least facilitated, in a variety of gentle ways, some of which can be learned.
Parents too control their children (or at least try), often by setting limits for their behavior. Part of the successful socialization process requires that children be prevented from engaging in behaviors that might be injurious to themselves or to others. Thus, parents do not permit their children to play with the dinner as it is cooking on the stove, to insert knives into electrical outlets, to jump off ladders, or to swim in dangerous waters. Less extreme instances of control involve the teaching of socially appropriate behavior, of values and morals—of "shoulds" and "should nots". It is less by accident than by virtue of parental control that children learn not to deface wall, steal other people’s property, or kill the neighbor’s god. In short, certain standards of behavior are learned at least partly as a function of parental control. Whether that control involves reinforcement, punishment, models, reasoning, or a combination of these and other strategies, we cannot avoid the fact that control is being exercised.
The classroom situation is not really very different. Teachers have often been described as acting [in loco parentis]—in the place of parents. More precisely, teachers have been urged to act in all ways as might a wise, judicious, and loving parent. And there is, in fact, no great incompatibility between values held in highest esteem by those who describe themselves as humanistically oriented and the techniques of behavior control that have been described by science. Love, empathy, warmth, genuineness, and honesty can go a long way toward ensuring a classroom climate corducive to and learning and development. In spite of these highly desirable qualities, however, discipline problems are not uncommon in classrooms. That teachers should judiciously administer rewards and punishment in an effort to maintain an effective educational environment does not mean that they care less for their students; indeed, in might well indicate that they care more.

The passage indicates that the current educational spirit is characterized by______.

A.unjustified control

B.unpopularity

C.liberal and permissive educational methods

D.deliberate exercise of restrictions

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