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Nikola Tesla invented alternating current technology that en

题目
填空题
Nikola Tesla invented alternating current technology that enabled electricity to be transmitted over long distances.____
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第1题：

What is a primary objective of the security architecture assessment? ()

A. document power and UPS availability

B. to integrate routing and switching components

C. create a design specification document

D. document the customer‘s current and future technology projects


参考答案：B

第2题：

材料：

The field current supply in older machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern machines however are either statically excited or of the high-speed brush-less type. The exciter is required to operate to counter the effects of power factor for a given load. The power factor is a measure of the phase difference between voltage and current and is expressed as the cosine of the phase angle. With a purely resistance load the voltage and the current are in phase, giving a power factor of one. The power consumed is therefore the product of voltage and current. Inductive or capacitive loads, combined with resistance loads, produce lagging or leading power factors which have a value less than one.

The power consumed is therefore the product of current, voltage and power factor. The alternating current generator supplying a load has a voltage drop resulting from the load. When the load has a lagging power factor this voltage drop is considerable. Therefore the exciter, in maintaining the alternator voltage, must vary with load current and also the power factor. The speed change of the prime mover must also be taken into account.

问题： The word “machines” in the passage refers to _____.

A.the direct current generator

B.the alternating current generator

C.the exciter

D.the prime mover

Which of the following statements is true according to the passage ?

A.With a purely resistance load, the power factor is zero

B.Inductive loads combined with resistance loads produces leading power factors

C.Capacitive loads combined with resistance loads produces lagging power factors

D.With a purely resistance load, the phase angle is zero

When the load has a lagging power factor this voltage drop is considerable. This sentence means that _____.A.with a purely resistance load, the voltage drops too much

B.there is a considerable voltage drop in the capacitive load combined with resistance load

C.when the load is the capacitive load combined with resistance load, the voltage drops to zero

D.when the load is the inductive load combined with resistance load, the voltage drop is fairly large

The exciter must vary with: ① load current ② the power factor, ③ speed change of the prime mover.A.①

B.②

C.①②

D.①②③

请帮忙给出每个问题的正确答案和分析，谢谢！


问题 1 答案解析：B


问题 2 答案解析：D


问题 3 答案解析：D


问题 4 答案解析：D

第3题：

G5500可支持哪些类型的GPU?( )

A.Tesla V100

B.Tesla P40

C.GTX 1080

D.Tesla P4


正确答案：ABD

第4题：

嵌段共聚物（）copolymer

A.random
B.block
C.graft
D.alternating

答案：B
解析：

第5题：

Text l If comfortably outpacing your rivals is the main measure of automotive achievement,Tesla's electric car is a resounding success.The Model S last year outsold its nearest luxury rival,Mercedes's petrol-engined S-class,by 30qo in America.And in its top specification the Tesla will also beat the Cerman car in the race from 0-60mph.As a battery-maker Tesla is also moving fast.This week it announced plans to build a"gigafactory"in America to make lithium-ion power-packs,that it hopes will propel its vehicles to the mainstream.Tesla's acceleration has been rapid.Launched a decade ago by Elon Musk,a founder of PayPal and serial tech entrepreneur,last year it sold around 22,000 cars and by the end of 2014 hopes to be making l,000 a week.In early 2015 Tesla will add the Model X,a medium-sized SUV,to its range.However,Tesla's impressive growth has not yet tranalaLed into significant profits.A series of b8ttery fires also briefly dented sales growth last year.Nevertheless,Tesla's shares surged on February 25th,to value the company at over$30 billion after Morgan Stanley,a bank,joined its adoring fans.It reckons that the battery factory will not only propel it along the road to mass manufacturing but also make it a leading competitor in low-cost enerOr storage,Lhe key to making renewable energy more practical.The bank is also confident that Tesla's Silicon Valley location will put it in the driverless front seat of autonomous motoring.A recent meeting with Apple,and the iPad-like control panel of the Model S,have convinced some ob~servers that a takeover-and an iCar are around the corner,although Mr Musk insists that his firm is not for sale.Tesla has defied its doubters with the success of the Model S,a smartly styled luxury car.It may not share the outrageous looks of a supercar like the Lamborghini Aventador,but it has the performance without the$400,OOO-plus price tag.The most basic Model S costs$64,000 in America.This has won it rave reviews in the motoring press,often sniffy about other electric cars with limited ranges and duff looks.By designing a large car wiLh a big battery pack,Tesla has diminished"range anxiety"-one version can d0 310 nules（500km）between charges.
It can be inferred from Paragraph 2 that_____

A.Tesla's electric car will become mainstream in the market
B.Tesla will make a great fortune in 2015 thanks to its new model
C.it may take a while for Tesla to recover from the battery accidents
D.Tesla pursues environmentally-friendly cars rather than huge profits

答案：C
解析：
推理题。定位到第二段。首先，选项[A]在该段没有对应内容，该段未提到maIn8tcam-词，该项属于无中生有。选项[B]的2015和new model对应该段的“In early 2015 Tesla will add the Model X，a medium-sized SUV．to its range.”一句，但是该项的make a great fortune“大赚一笔”文中并无体现，故该项错误。选项[c]对应该段最后一句：A series of battery fires also briefly dented sales growth lasl year.“去年，一系列电池起火事件削弱了其销售增长势头。”由此可见，该项的it may take a while for Tesla to recover from the battery 8ccident8“特斯拉可能需要一段时间才能从电池事故中恢复过来”的推理正确。选项[D]的environmentally-friendly原文并未提到，该项也是错误的。综上，本题答案为[c]。

第6题：

What are three current business factors that are influencing customer decisions in making technology investments?()

A.number of product features

B.return on investment

C.competitiveness

D.regulation

E.day one costs

F.availability of budget


参考答案：B, C, D

第7题：

Which word indicates color variation in the characteristics of a light?

A.Opposing

B.Changing

C.Reversing

D.Alternating


正确答案：D

第8题：

Which of the following components are used to convert alternating current produced in the generator windings to direct current?

A.Armature and equalizer

B.Commutator and brushes

C.Rotor and interpoles

D.Field and exciter


正确答案：B

第9题：

How are we to develop new technology if we can’t study current technology to figure out how to______it?

A.improve
B.rest
C.cause
D.conceal

答案：A
解析：
本题考查内容为词意辨析。A选项意为“改善、增进”，B选项意为“使休息、使放松”，C选项意为“引起、使遭受”，D选项意为“隐藏、隐瞒”，题目意为“如果我们不能研究现有技术从而对其进行____，如何能够开发新技术？”因此选A，对其进行改进。
　　

第10题：

What is a primary objective of the security architecture assessment? （）

  • A、document power and UPS availability
  • B、to integrate routing and switching components
  • C、create a design specification document
  • D、document the customer's current and future technology projects

正确答案:B

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