下列对串联型带放大环节稳压电源表述正确的是()。A、有调整元件、比较放大、基准电源、

题型:多项选择题

问题:

下列对串联型带放大环节稳压电源表述正确的是()。

A、有调整元件、比较放大、基准电源、采样电路

B、放大对象是采样信号与基准电源的差值

C、需要时,调整管才工作;不需要时,调整管不工作

D、比并联型稳压电路的输出电流大

考点:电气值班员考试电气值班员技师考试电气值班员技师考试题库
题型:多项选择题

网络对人们的生活产生影响。回答下面各题。

小题1:随着生产和科技的发展,各种移动新媒体的普及,通过手机等无线设备支付订单,网购已经成为一种新的消费方式。这表明

①消费是社会再生产的重要环节      

②消费对生产的调整和升级起重要作用

③消费的方式、质量是由生产决定的      

④生产为消费提供对象,为消费创造动力

A.①②

B.①③

C.②④

D.③④小题2:网购由于省时省力又便宜,广为人们接受,但随乏而来的关于网购的投诉也越来越多。这反映了

A.矛盾有主要和次要之分

B.量变引起质变

C.事物都是一分为二的

D.事物都是表里如一的

题型:多项选择题

具有“有花,两片子叶,叶脉一般具有网状脉”特征的植物是[ ]

A.水稻  

B.葫芦藓 

C.马尾松  

D.大豆

题型:多项选择题

个人或组织开展的活动所取得的成就或产生的积极效果是()

A.效率

B.绩效

C.奖励

D.目标

题型:多项选择题

在停电作业时,在验明确已停电后,要立即在作业地点()和与作业地点相连可能来电的停电设备上装设接地线(包括作业区段附近其他带电设备停电时)。必须保证接地线有()。

A、一端

B、两端

C、足够的截面

D、良好的导电性

题型:多项选择题

Psychologists once believed that the motive that caused men to strive to attain high-level managerial positions was the "need for achievement". But now they believe it is the "need for power".
Power seekers strive hard to reach positions where they can exercise authority over large numbers of people. (46) Individual performers who lack this drive are not likely to advance far up the managerial ladder. They usually scorn company politics and devote their energies to other types of activities. The power game is part of management, and it is played best by those who enjoy it most.
(47) One of the least rational acts of business organizations is that of hiring managers who have a high need to exercise authority, and then teaching them that authoritative methods are wrong and that they should be consultative or participative. (48) It is a serious mistake to teach managers that they should adopt styles that are inconsistent with their unique personalities. Yet this is precisely what a large number of business organizations are doing; and it explains, in part, why their management development programs are not effective.
(49) What managerial aspirants should be taught is how to exercise their authority in a way that is appropriate to the situation and the people involved. They need to learn that the real source of their power is their own knowledge and skill, and the strength of their own personalities, not the authority conferred on them by their positions. When they lack the knowledge or skill required to perform the work, they need to know how to share their authority. (50) But when they know what has to be done and have the skill and personality to get it done, they must exercise their traditional authority in whatever way is necessary.

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