为了限制直流电动机的启动电流,可采用降低()的方法。 A.定子电压 B.电枢电压 C

题型:单项选择题

问题:

为了限制直流电动机的启动电流,可采用降低()的方法。

A.定子电压

B.电枢电压

C.励磁电压

D.定子电流

考点:维修电工考试维修电工(中级)维修电工(中级)题库
题型:单项选择题

商誉价格鉴证中一般为( )。

A.在同类型企业中,超额收益越高,商誉价值越大

B.企业是否拥有预期超额收益是判断其有无商誉的标志

C.当前正在亏损的企业,不存在商誉

D.企业为形成商誉的投资越多,商誉价值就越高

E.商誉是由众多因素共同形成的

题型:单项选择题

如图所示,水平光滑的平行金属导轨,左端接有电阻R,匀强磁场B竖直向下分布在导轨所在的空间内,质量一定的金属棒PQ垂直导轨放置。今使棒以一定的初速度v0向右运动,当其通过位置a、b时,速率分别为va、vb,到位置c时棒刚好静止,设导轨与棒的电阻均不计,a到b与b到c的间距相等,则金属棒在由a到b和由b到c的两个过程中(    )

A.回路中产生的内能不相等

B.棒运动的加速度相等

C.安培力做功相等

D.通过棒横截面的电量相等

题型:单项选择题

阅读短文,根据短文内容及首字母提示,在空白处填入一个适当的单词。

Years ago in Scotland, the Clark family had a dream. The couple worked and saved, making小题1: p     for their nine children and themselves to travel to the USA. It had taken years before they saved enough money and got everything小题2: r        for the trip.

The whole family was excited about their new life. However, seven days 小题3: b________       they left for the USA, the youngest son was bitten by a dog. The doctor treated the boy, 小题4: b____      because there was a possibility of rabies(狂犬病), they would be kept away from others for fourteen days.

The family’s dream could not come小题5: t   __   . They would not be able to make the trip to America as they had planned. Watching the ship leave---without the Clark family, the father was quite 小题6: a      with both his son and God for their bad luck.

Five days later, a piece of sad news小题7: s   __   throughout Scotland---the strong and powerful ship, Titanic, had gone down, taking小题8: h        of lives with it. The Clark family was to have been on that ship, but because the son was bitten by a dog, they were left 小题9: b_____        in Scotland.

When Mr Clark heard the news, he thanked his son for saving the family. He thanked the God for小题10: t       a sad thing into a good one.

Although we may not always understand, all things happen for a reason.

题型:单项选择题

系统自动联动记入代保管品的为哪一类存单()。

A.电子存单

B.纸质存单

C.他行存单

D.我行存单

题型:单项选择题

气动薄膜式执行机构可分为正作用和反作用两种。当自调节器来气压信号增大,推杆()。

A.向下移动为反作用式

B.向下移动为正作用式

C.向上移动为正作用式

D.不动为反作用式

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