自并激励发电机对继电保护有什么影响?应采取什么措施?

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问题:

自并激励发电机对继电保护有什么影响?应采取什么措施?

考点:火电电力职业技能鉴定考试水电自动装置检修工(高级)水电自动装置检修工(高级)题库
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Gasoline (汽油) prices are getting higher and higher. The prices make it hard for drivers to afford the fuel.
One group held a special event to display(展示)new kinds of cars .
The new cars are different and they can run on many different kinds of fuels .

Some of these cars are called hybrids(混合动力). They can run on different kinds of fuels . One kind of them runs on a special fuel cell which is filled with a gas called hydrogen(氢气). ___小题1:___  They are very clean , and don’t give off bad fumes(烟雾) when they run .
The man who makes fuel cell cars is excited about the technology .__ 小题2:___ Once we use oil up , it will take millions of years for more oil to form. Since gasoline is made from oil , that could be a problem for companies that make traditional cars , and for drives . __小题3:__
Buses that run on hydrogen fuel cell power are being tested on the road . They could become a common form of transportation in the near future
A. The fuel cell cars are also better in another way .
B. However, it won’t be a problem for cars that run on fuel cells ..
C. He says we will never run out the fuel, but we may run out of oil.
小题4:What do you think of this kind of new cars ? Why ?
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TD-LTE中心机房地网到机房的接地引入线的长度不宜超过()

A.10m

B.20m

C.30m

D.40m

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某公司预计本年度有关资料如下:(1)息税前利润800万元;(2)所得税率40%;(3)预期普通股报酬率15%;(4)总负债200万元,均为长期负债,平均利息率10%;(5)发行股数60万股,每股市价20元。 要求:(1)计算该公司预期的总资产报酬率 (期初资产800万元); (2)预计该公司本年净利润的50%用于发行股利,预计以后股利年增长率为5%,要求利用股票估价模型确定股票价值; (3)计算该公司的综合资金成本。

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平均车日行程是指企业在计算期内平均每个()的行驶里程。

A.总车日

B.完好车日

C.工作车日

D.停驶车日

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双层集装箱运输的线路,接触线距钢轨顶面的高度不超过()。

A.6330mm

B.6450mm

C.6500mm

D.6550mm

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