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[主观题]

一台50Hz的三相同步电机,转子以同步转速旋转,定子三相绕组电流产生的5、7次谐波磁动势在定、转子绕组中感应的

电动势的频率分别是多少?
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更多“一台50Hz的三相同步电机,转子以同步转速旋转,定子三相绕组电流产生的5、7次谐波磁动势在定、转子绕组中感应的”相关的问题

第1题

When talking to people within your company()don’t speak your language, you may have to

When talking to people within your company()don’t speak your language, you may have to use English.

A、who

B、which

C、whose

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第2题

"So don't forget as you ease on down my road" means _________.

A、Trouble might visit you even if your life goes well.

B、Remember to put trouble on the road when you travel

C、Don't trouble trouble on the road

D、Don't forget your happy days when your life goes down

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第3题

Don't worry. I'd ______ your baby when you are away at work.A.see toB.see throughC.see off

Don't worry. I'd ______ your baby when you are away at work.

A.see to

B.see through

C.see off

D.see over

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第4题

One disadvantage of permanent life insurance is that it is much more expensive than term life insurance.

A.Universal life insurance was the best solution to the rigidity of whole life insuranc

E.It let consumers enjoy much greater flexibility by allowing premium payment amounts to be adjustabl

E.With a universal life policy, you could also withdraw from your plan without the heavy penalties and interest that whole life plans carried with them.

B.Other varieties of permanent life insurance later came on the sc

E.For example,variable life insurance emerged as a solution for consumers who wanted to take a greater risk with their investment but also gain the potential for much higher returns. Variable permanent life insurance is the best of both worlds because it combines the perks of whole life with the flexibility of universal. You can have greater control over the money you invest in your plan when you choose this option. Additionally, permanent health insurance plans all have great tax breaks, so when you combine the tax incentives of permanent life with the possible returns of investing in a variable plan, you may see your money explode in growth over tim

E.No matter which permanent life option you choose,if you think you are a candidate for coverage,you should seek out an independent financial advisor that can assist you with choosing from these options.

C.You know that investing, risk, and liquidity are not your primary motivators for purchasing life insuranc

E.The main reason is to protect your family with money for their living expenses if you di

E.The great thing about permanent life insurance is that it accomplishes this goal for your whole lifetime,and although investing is secondary, you also get the key benefit of an investment component. A permanent life insurance policy has a kind of "savings account" built right into the policy, so you have the ability to tap into or borrow against the cash value your policy has accumulated over time

D.Permanent life insurance is better than term life because term insurance only covers you for a predetermined number of years. Although term life plans carry much lower premium payments, the policies build up no cash value over tim

E.Permanent life plans are also great because the cash value that you accumulate over time is not taxed until you decide to withdraw it. You can even sidestep those taxes by taking out a loan against your policy. This is great for people who make a lot of money because they can shelter their earnings in a permanent life plan when they have maxed out all of their other investment options.

E.One of the primary disadvantages of permanent life insurance is that it provides more coverage than most people may nee

D.In addition, if you have not maxed out your other investment options, then a permanent life plan might not be your best investment. The goal of permanent life insurance is to provide growth and protection for investors, but most should really seek out those characteristics in separate plans.

F.Additionally, because premiums for permanent life plans tend to be very high, you may be tempted to buy less of a death benefit than you really nee

D.For example,a permanent life insurance policy for $1 million for a 40-year-old woman in great health may cost her as much as $13,900 a year. On the other hand,that same woman could land a $1 million term policy for 20 years for about $750. That’s a massive price difference,so cost may essentially be the biggest disadvantage of permanent life insuranc

E.G. Finally, permanent health insurance plans may not be very transparent, so it may be difficult to figure out how much the policy is actually worth as an investment. Some financial experts point out that a good solution to this problem may be to buy a term policy and invest the rest of your money through other avenues. The first place to start is to ask for life insurance quotes and evaluate which option is right for you.

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第5题

Some people think of life as a game. There are similarities between life and games: both c
an be played, both have rules, and both turn out winners and losers. There are differences __56__ the two, however. Games make you __57__ away from life; the more you play, the less you pay __58__ to the more important things in life. In life, you get only one chance to play. When your life is over, the game is over. Life is not a game. Life is the __59__ thing. Life is unpredictable (不能预测的) ; you can play it right and still __60__.Life is not always fair; one wrong move or one bad choice may __61__ too many such moves or choices in life. Take a chance with your life and it could be the last chance you get. Life isn&39;t always fun, but it can be if you decide to make it that __62__.

__63__, the advice is "Enjoy your life; take risks, but don&39;t engage __64__ risky behavior." Think __65__ the things you do and the things you shouldn&39;t do. Don ’t play with you r life in the following points. Don&39;t play with your safety. Don&39;t ignore proven safety measures.

Safety measures and safety equipment have one purpose: to __66__ you safe. _67__ your seat belt when you drive a car; wear a helmet(头盔)when you __68__ a motorcycle. Your safety is in your __69__. Don&39;t play with money.

You can make your money _70__ or you can throw it all away. Don&39;t pay with a credit card if you don&39;t have the money to pay __71__ the bill when it comes. Save some of your money. Think twice before __72__ a purchase, no matter how __73__ it is. Skip (省去) the cup of coffee or the can of soda each day, and save the money you would have spent. In just a few years, you will have saved thousands of dollars. Save more, and you&39;ll have more. The habits you __74__ today will affect you financially for the rest of your life. Learn how to __75__ your money.

56___________

A.beyond

B.besides

C.between

D.among

57A.engage

B.turn

C.change

D.think

58A.attention

B.resistance

C.importance

D.vacation

59A.proud

B.short

C.false

D.real

60A.lose

B.succeed

C.pass

D.earn

61A.awake

B.permit

C.cause

D.arise

62A.energy

B.trip

C.hope

D.way

63A.Besides

B.Thus

C.Also

D.But

64A.at

B.out

C.in

D.to

65A.about

B.with

C.beside

D.down

66A.turn

B.keep

C.gain

D.reach

67A.fasten

B.prevent

C.pretest

D.resist

68A.get

B.sit

C.move

D.ride

69A.gloves

B.areas

C.hands

D.sights

70A.intend

B.shorten

C.grasp

D.grow

71A.at

B.for

C.with

D.out

72A.make

B.take

C.making

D.taking

73A.small

B.short

C.high

D.big

74A.develop

B.extend

C.Instruct(ion)

D.offend

75A.promote

B.manage

C.consider

D.overlook

请帮忙给出每个问题的正确答案和分析,谢谢!

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第6题

Alliteration…

A、Is when you use sounds like ‘Boom!’ and ‘Pow!’ to describe something

B、Is when you use exaggerated language for your descriptions

C、Is the repetition of similar sounds in a sentence

D、All of the above.

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第7题

Some people think of life as a game. There are sim...

Some people think of life as a game. There are similarities between life and games: both can be played, both have rules, and both turn out winners and losers. There are differences __56__ the two, however. Games make you __57__ away from life; the more you play, the less you pay __58__ to the more important things in life. In life, you get only one chance to play. When your life is over, the game is over. Life is not a game. Life is the __59__ thing. Life is unpredictable (不能预测的) ; you can play it right and still __60__.Life is not always fair; one wrong move or one bad choice may __61__ too many such moves or choices in life. Take a chance with your life and it could be the last chance you get. Life isn&39;t always fun, but it can be if you decide to make it that __62__.

__63__, the advice is "Enjoy your life; take risks, but don&39;t engage __64__ risky behavior." Think __65__ the things you do and the things you shouldn&39;t do. Don ’t play with you r life in the following points. Don&39;t play with your safety. Don&39;t ignore proven safety measures.

Safety measures and safety equipment have one purpose: to __66__ you safe. _67__ your seat belt when you drive a car; wear a helmet(头盔)when you __68__ a motorcycle. Your safety is in your __69__. Don&39;t play with money.

You can make your money _70__ or you can throw it all away. Don&39;t pay with a credit card if you don&39;t have the money to pay __71__ the bill when it comes. Save some of your money. Think twice before __72__ a purchase, no matter how __73__ it is. Skip (省去) the cup of coffee or the can of soda each day, and save the money you would have spent. In just a few years, you will have saved thousands of dollars. Save more, and you&39;ll have more. The habits you __74__ today will affect you financially for the rest of your life. Learn how to __75__ your money.

56___________

A.beyond

B.besides

C.between

D.among

57A.engage

B.turn

C.change

D.think

58A.attention

B.resistance

C.importance

D.vacation

59A.proud

B.short

C.false

D.real

60A.lose

B.succeed

C.pass

D.earn

61A.awake

B.permit

C.cause

D.arise

62A.energy

B.trip

C.hope

D.way

63A.Besides

B.Thus

C.Also

D.But

64A.at

B.out

C.in

D.to

65A.about

B.with

C.beside

D.down

66A.turn

B.keep

C.gain

D.reach

67A.fasten

B.prevent

C.pretest

D.resist

68A.get

B.sit

C.move

D.ride

69A.gloves

B.areas

C.hands

D.sights

70A.intend

B.shorten

C.grasp

D.grow

71A.at

B.for

C.with

D.out

72A.make

B.take

C.making

D.taking

73A.small

B.short

C.high

D.big

74A.develop

B.extend

C.Instruct(ion)

D.offend

75A.promote

B.manage

C.consider

D.overlook

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第8题

Account for the boom in adult education and discuss the main reasons within 60 minutes. Th
e length of your essay should be about 300 words.

In the first part of your writing you should present a brief description of adult education boom and in the following part you should present the reasons with appropriate examples. In the last part you may state your own view on this topic.

Mark will be awarded for content, organization, grammar, and appropriacy. Failure to follow the above instructions may result in a loss of marks.

Adult Education Boom

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第9题

What will happen if your work life and personal life feel out of balance A) You wiWhat wi

What will happen if your work life and personal life feel out of balance A) You wiWhat will happen if your work life and personal life feel out of balance A) You will have little time to finish your work. B) You may feel stress, which will affect you negatively. C) You will have a lot of time to share with your family. D) You will never balance the combination of life and work.

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