在直流高压输出端加装电容器后,在正半波充电时储存电荷,补偿负半波放电时引起的电压幅值

题型:单项选择题

问题:

在直流高压输出端加装电容器后,在正半波充电时储存电荷,补偿负半波放电时引起的电压幅值的衰减,使试验()基本保持不变。

A.电流

B.电阻

C.电压

D.阻抗

考点:国家电网农网配电生产技能考试配电、供电、照明配电、供电、照明题库
题型:单项选择题

One morning, Mr. Smith came into the garden at the back of his house. He saw so much snow in the garden. Mr. Smith wanted to take his car out, so he asked a man to clean the road from his garage (车库) to the gate. He said to the man, “Don't throw any snow on the side. It will damage(破坏) the flowers in my garden, and don't throw any on the other side, because it will damage the wall. And don't throw any into the street, because the policeman will come.” Then he went out.

When he came back, the road was clean. There was no snow on the flowers, or the wall or the street. But when he opened the garage to get his car out, he saw: the garage was full of snow, the snow from the road, and his car was under the snow.

小题1:In the morning Mr. Smith found ______ was full of snow.

A.his garden

B.his garage

C.his house

D.his car小题2:He wanted a man to clean the road because ______.

A.He didn't like the snow.

B.He liked the very much.

C.He wanted to take his car out.

D.He often asks the man to clean the road.小题3:Where was Mr. Smith's car?

A.Under the snow.

B.In the street.

C.In the garden.

D.In the back of the garage.

题型:单项选择题

部门负责人作关系局部及中长期决策的信息,如月销售计划完成情况,单位产品成本,市场行情等信息属()。

A.操作管理信息

B.知识管理信息

C.战术管理信息

D.战略管理信息

题型:单项选择题

一台一次风机跳闸的处理。

题型:单项选择题

泻白散与清骨散的组成中均含有的药物是

A.桑白皮

B.地骨皮

C.牡丹皮

D.五加皮

E.茯苓皮

题型:单项选择题

下列哪种寄生虫最易引起严重的缺铁性贫血()

A.肺吸虫

B.血吸虫

C.钩虫

D.蛲虫

E.鞭虫

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