Are the motors “single phase electric” or “ Three-phase elec

97年考研英语完形填空求解释.
空格 industrialgiant like General Motors and IBM struggle to survive by redeing the number of emplyees,Manpower(一公司),based in Milwakee ,Wisconsin is booming
A)For B)Because C)As D）Since.为什么其他的不行啊?
另外新手没那么多分,

英语翻译
Bill Gates and the president of General Motors have met for lunch,and Bill is going on and on about computer technology.“If automotive technology had kept pace with computer technology over the,past few decades,you would now be driving a V-32 instead of a V-8,and it would have a top speed of 10,000 miles per hour,” says Gates.“Or,you could have an economy car that weighs 30 pounds and gets a thousand miles to a gallon of gas.In either case,the sticker price（标价） of a new car would be less than $ 50.Why haven’t you guys kept up?”
The president of GM smiles and says,“Because the federal government won’t let us build cars that crash four times a day.“
Why is that funny （or not funny,as the case may be）?Human beings love to laugh,and the average adult laughs 17 times a day.Humans love to laugh so much that there are actually industries built around laughter.Jokes,sitcoms and comedies are all designed to get us laughing,because laughing feels good.For us it seems so natural,but the funny thing is that humans are the only species that laughs.Laughter is actually a complex response that involves many of the same skills used in solving problems.
Laughter is a great thing--that’s why we’ve all heard the saying,“Laughter is the best medicine.” There is strong evidence that laughter can actually improve health and help fight disease.When we look at laughter--what it is,what happens in our brains when we laugh,what makes us laugh and how it can make us healthier and happier,there’s a huge amount about it that no one understands yet.

英语翻译
motor,pm dc motors can be classifed accroding to commutation scheme and armature design.conventional dc motors have mechanical brushes and commutators.in one important class of dc motors the commutation is done electronically this type of motor is called a brushless dc motor.
the rotor and stator configuration fo an iron-core pm dc motor is shown in figure 5.2.2the permanent-magnet material can be barium-ferrite,alnico,or rare-eath compound.the magnetic flux produced by the magnet passes through a liminated rotor structure that contains slots.the armature conductors are placed in the rotor slots.this tope of dc motor is characterized by relatively hige rotor inertia (since the rotating part consists of the armatuer windings) high inductance,low cost,and high reliability.

德语Tipps:den haupten Zweck des Motors zu verwenden,ermoeglicht etw zu unterstuetzen.
den haupten Zweck 四格?做什么成分啊?这句话主语是什么?

英语翻译
It must be necessary the connection of the motors,to its corresponding frequency converters on the electric panel,in the way that this element allows the progressive starting up of the mentioned motors,and consequently the progressive starting up of the blades that makes them work,at the same time that makes possible the correct adjustment of the speed of the blades,depending on the necessities of the working procedure and the optimum working rate of the equipment.To make a correct installation and connection of this elements.It is possible to follow the electrical scheme that it is provided by our company.which can be used as guide.

英语翻译
这句话的全文是：
Motors with a capacity of more than 20 kw may be connected to the powers suply network only if equipped with current-limiting starters.
请顺便翻译这句话
翻译软件 are not permited

Electric bicycles which run on battery-operated (电瓶) motors are winning over riders of ordinary bikes 41 their speed, quality and environmental advantage. They were first 42 on 1980s in China, but the selling was not very good. Today, thanks 43 improvements on battery quality, the electric bikes sell well. There are now more than 100 electric bicycle producers in China and 26 million such bicycles were produced in 2011. Japan is another large 44 of such bicycles in the world with a total production reaching 381,721in 2010. 45 China is one of the largest producers of electric bicycles in the world, the 46 of its producers with mass production (大批量生产) is actually small. Electric bicycles are still 47 in China. Time is needed for people to become familiar with them and accept them. Each bike’s price of between 2,000 yuan (US $318) and 3,000 yuan (US $477) is still48 for ordinary citizens (民众). Although such bikes are quick, safe and 49 to operate, their batteries still have shortcomings (不足). They weigh more than 10 kilograms; their service life is 50 two years and they 51 400 yuan each. There were more than 450 million bikes in China in 2006. If just one percent of all these bikes are replaced by electric 52 , the market will be very large. And 53 the battery is further improved and the price is 54 , many of us will not be able to keep back from 55 the latest electric bikes 小题1: A．because of B．because C．towards D．at 小题2: A．build B．built C．building D．to build 小题3: A．for B．in C．by D．to 小题4: A．producer B．production C．produce D．to produce 小题5: A．But B．If C．Although D．When 小题6: A．buyer B．number C．price D．owner 小题7: A．old B．tall C．new D．short 小题8: A．small B．large C．expensive D．high 小题9: A．easy B．difficult C．hard D．easily 小题10: A．other than B．more than C．over D．less than 小题11: A．spend B．cost C．take D．make 小题12: A．cars B．bike C．ones D．one 小题13: A．where B．unless C．whether D．if 小题14: A．increased B．raised C．reduced D．lifted 小题15: A．buying B．brought C．to buy D．buy

英语翻译
Fault diagnostic of induction motors for equipment reliability and health maintenance based upon Fourier and wavelet analysis

这里的frame是什么意思
WEG motors are supplied with POLYREX EM 103 grease (Supplier:Esso) up to frame 450

英语翻译
the control of the receiver board to the motors is full-throw.

英语翻译
3) Servo motors control
At the beginning the film is transferred at a low speed,and then the servo
motors are accelerated to set speed to wind at high speed at about 8 miles per second.The film tension is detected by load cells which control servo motors
velocity to keep tension constant.The objective of control is not only to keep film tension constant but also to make winding velocity arrive at set value at least time.So the main problem is how to control servo motors accurately.
4,CONCLUSION
A monitoring system for PLC controlled manufacturing System Based on
fieldbus for film plating production process is presented in this paper.It has
been successfully on operation in practical production since 2003.Promising results have demonstrated its great advantage in practice as well as
significant profit improvement.
5.ACKNOWLEDGMENT
The research has been supported by Shanghai Educational Committee
and Shanghai Kelai mechatronics engineering Co.,Ltd..
6.REFERENCES
1.J.C.Xing,P.Wang,B.Y.Cheng,S.Q.Wang,and Q.L.Yang,"Fieldbus Based Distributed Control System," 8th International Conference on Control,Automation,Robotics and Vision Kunming,China,6-9th December 2004,pp.1690-1694.
2.Q.Sheng,X.Z.Gao,and X.Y.Zhuang,"PLC-based Control Systems for Industrial Production of Fuel Alcohol" IEEE ICIT' 02,Bangkok,THAILAND,pp.827-832.
3.W.Hu,M.Schroeder,and A.G.Starr,"A Knowledge-Based Real-Time Diagnostic System for PLC Controlled Manufacturing Systems," 1999 IEEE,pp.499-504.
4.Maria G.loannides,"Design and Implementation of PLC-Based Monitoring Control System for Induction Motor," IEEE Transactions On Energy Conversion,VOL.19,NO.3,September 2004,pp.469-476.
5.Y.M.Jia,F.H.Su,J.Liu,"An On-line Insulation Monitoring System Based On Fieldbus" ,
pp.769-772.

跟起始扭矩有关的.
原题：Which of the following motors usually produces the largest starting torque?
大概意思就是：下面那个发动机能产生最大的起始扭矩.
选项：
series-wound 串联的
permanent-magnet 永久磁铁
shunt-wound 并联的
compound 混合的