如图电路中,电源电动势E=6.3V,内电阻r=0.5,电阻=2,=3,变阻器电阻

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问题:

如图电路中,电源电动势E=6.3V,内电阻r=0.5,电阻=2=3,变阻器电阻R=5Ω,滑片P从变阻器b端滑到a端过程中

(1)电流表A的示数变化范围是多少;

(2)电压表V的示数变化范围是多少.

考点:闭合电路欧姆定律
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电梯电磁制动器打不开,引起的原因可能是()。

A.时间继电器延时调整不当

B.上行出现这种现象,感应器常闭点一直接通

C.交流梯机械缓速开关不通,造成层层换速停车

D.制动器经济电阻断丝或调整不当

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选出下列各组语句中句意明确、没有语病的一句:    

A.一个产业的知识创新和技术进步刚开始发展的时候,这个产业就会处在快速上升的阶段,成为一个朝阳产业;反之,则成为夕阳产业。

B.20世纪末,人类能否和平迈入新的世纪,取决于西方资本主义对世界走势的清醒判断和理智使用自由力量的能力。

C.乍得总统哈布雷十四日说,乍得政府希望与利比亚谈判,以寻求解决两国间的矛盾。

D.我们历来主张向外国先进的科学文化学习和借鉴,而且已经这样做了;但我们也历来反对盲目照搬外国,全盘西化──事实证明,那样做是极端错误的。

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In this section you will find after each of the passages a number of questions or unfinished statements about the passage, each with 4 (A, B, C and D) choices to complete the statement. You must choose the one which you think fits best. Then blacken the corresponding letter as required on your Machine-scoring ANSWER SHEET. The time for this section is 70 minutes.

Social control refers to social processes, planned or unplanned, by which people are taught, persuaded, or forced to conform to norms. In every society, some punishments or negative sanctions are established for deviant behavior. Without deviant behavior there would not be need for social control and without social control there would not be a way of recognizing the boundary between the acceptable and the unacceptable.
Social control may be either formal or informal. Informal mechanisms include expressions of disapproval by significant others and withholding of positive rewards for disapproved behavior. Most people internalize norms in the course of socialization. This is any group’s most powerful protection against deviance, in that the individual’s own conscience operates as an agent of social control. When informal sanctions fail, formal agents of social control may be called upon. In contemporary society, such formal agents and agencies include psychiatry and other mental health professions; mental hospitals; police and courts of law; prisons; and social welfare agencies. All these formal agents function to limit, correct, and control violation of norms. Conflict theorists would also point out that social control agents and systems tend, in any society, to serve the interests of powerful groups and to enforce the norms most beneficial to those who make the rules and who, therefore, define unacceptable behavior.
Social control, whether formal or informal, has a dual function. First, it punishes the wrongdoer and reaffirms the boundaries of acceptable behavior. Second, and less recognized, it regulates the manner in which deviants are treated.

Informal mechanisms of social control include the following EXCEPT______.

A.a high level of interest in ensuring conformity

B.expression of disapproval by significant others

C.withholding of positive rewards for the deviants

D.people’s internalization of norms in socialization

题型:问答题

如果要在菜单中添加一个分隔线,则应将其Caption属性设置为______。

A.=

B.*

C.&

D.-

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唐朝是丝绸生产的______时期,无论产量、质量和种类都达到了前所未有的水平。丝绸的生产组织分为宫廷手工业、农村副业和独立手工业三种,______较前代大大扩大了。
依次填入划横线部分最恰当的一项是______。

A.鼎盛 规模
B.重要 范围
C.繁荣 种类
D.成熟 领域

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