对一般负荷供电的中型变配电所当装有电磁操动机构时,合闸电源宜采用硅整流,分闸电源可采

题型:单项选择题

问题:

对一般负荷供电的中型变配电所当装有电磁操动机构时,合闸电源宜采用硅整流,分闸电源可采用()。

A.小容量镉镍电池

B.硅整流

C.110V蓄电池组

D.220V蓄电池组

考点:电气工程师(供配电)变配电所操作电源变配电所操作电源题库
题型:单项选择题

阅读理解。

     This year in your grade you will have a lot of reading to do. You can do more of it in less time if you learn

to read rapidly.

     Perhaps you have been told about some habits which keep a person from reading fast and have been strongly

asked to break those habits which you might have.

     Do you still have any of these bad habits? Check yourself by answering "yes" or "no" to these questions:

     a. Do you move your lips when reading silently?

     b. Do you point to those words with your fingers as you read?

     c. Do you move your head from side to side as you read?

     d. Do you read one word at a time?

     If you answer "yes" to any of these questions, start at once to break the habit. If you move your lips, hold

your fingers over them, or hold a piece of paper between your lips while you are reading. Then if your lips

move, you will know it and stop them moving.

     If you point to words, hold the two sides of your book, one side with your left hand, the other side with your

right hand. Then you won't have a free finger to use in pointing while reading. If you move your head, place

your chin in one hand, and hold your head still.

     If you read no more than one or two or three words at a time, you need to work very hard in learning to take

in more words at each glance when your eyes are traveling across the lines of words.

     Even if you do read fairly fast now, you can learn to read even faster. As you probably have been told, the

secret of fast reading is to take in whole groups of words at each glance. Read in groups and force your eyes

along the lines of words as fast as you can make them go. Anyone who practices doing these two things will

be able to read faster.

1. While reading, you should _____.

A. not hold your books with your hands

B. not keep your head still

C. not use your finger to point to the words

D. do all of the things mentioned in A, B and C

2. You may hold your fingers over your lips when you read so as _____.

A. to feel whether your lips move or not

B. to tell others to be silent

C. to keep yourself from talking to others

D. to hold a piece of paper between them

3. When your eyes travel across the lines of words, _____.

A. you need to read the words out

B. you need look at every word carefully

C. you need to remember every word

D. you need to read several words at a time

4. If you can read fairly fast now, _____.

A. you don't need to learn to read faster

B. you can learn to read even faster

C. you can go on reading like that

D. you can enjoy reading

题型:单项选择题

点燃的镁条能在二氧化碳中继续燃烧,且燃烧时产生大量黑烟,还生成一种白反固体.则燃烧过程中发生的化学方程式为______,该反应中还原剂是______;根据化学方程式能获得信息:______;______;______(答三条).

题型:单项选择题

根据劳动合同法律制度的规定,用人单位与劳动者已建立劳动关系,未同时订立书面劳动合同的,应当自用工之日起______内订立书而劳动合同。

A.1个月
B.3个月
C.6个月
D.1年

题型:单项选择题

下列关于风险的说法,正确的是( )。

A.对大多数银行来说,存款是最大、最明显的信用风险来源

B.信用风险只存在于传统的表内业务中,不存在于表外业务中

C.对于衍生产品而言,对手违约造成的损失一般小于衍生产品的名义价值,因此其潜在风险可以忽略不计

D.从投资组合角度出发,交易对手的信用级别下降可能会给投资组合带来损失

题型:单项选择题

眩晕,动则加剧,劳累即发,面色苍白,心悸失眠,神疲懒言,纳差,舌淡,脉沉细无力。其证型是()。

A.肝阳上亢

B.气血亏虚

C.肾精不足

D.痰浊中阻

E.痰郁化火

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