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3.I figure out a good team of dogs, hitched to a light sled, can_________ 1,000 pounds of goods.
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4.In the story ,the little girl has a _________ stepmother, who makes her life a misery.
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5.Nothing ever becomes real till it is experience-even a proverb is no proverb to you till your life _________ it.
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6.Nowadays almost all libraries are finding it increasingly difficult to remain within their _________.
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7.You can increase a tyre’s grip in winter by slightly _________its pressure.
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8.Lake Superior, Huron, Erie, and Ontario are shared by the United States and Canada, and from part of the _________between the two countries.
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9.The police are investigating the three men allegedly _________organizing and carrying out the bank robbery.
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10.I do not doubt in the least that inflation leads to _________decline.
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11.A blizzard _______________great drifts of snow across the lake.
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12.Tim says _________everybody will be affected by the tax increase, but I’m sure he’s exaggerating.
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1.China’s economic success over the past three _________has raised the living standards of hundreds of millions of Chinese citizens.
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2.Citibank picked the chief executive of Etang.com as its first Chinese customer Thursday to open an account at its new branch in the _______Pease Hotel along Shanghai’s fabled waterfront.
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3.The United States last Wednesday _________tariffs关税 of up to 30 percent on a range of foreign steel imports to help protect its domestic国内的industry.
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4.Although he was raised as a Christian, he’s not really very _________.
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5.You can distinguish between frogs ands toads蟾蜍 in the following way: frogs have _________bodies, long limbs, and a smooth skin, and toads have stouter bodies, short limbs, and dry skin.
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6.From the airplane window I could see a _________of city streets.
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7.Aunt Pat smiled at her little niece and _________her to eat.
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8.Dr. Rich Hamilton is planning his own World Wide Web _________on the Internet to provide assistance to anyone who asks for medical help.
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9.It is difficult to estimate the number of people doing part-time jobs _________
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10.The president _________his foreign minister, Mr. Burns, to act as representative to the international conference to be held in Tokyo next month.
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11.Advances in telecommunications have meant that it is just as easy to work from a computer _________at home as it is from a town center office.
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12.Until the new gym is built, you have no option but _________existing buildings which may or may not suit your immediate目前的requirements.
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1.According to some scientists, global warming _________the survival of the whole human race.
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2.The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relatively small19%, and exceeded the number of overseas visitors16%_________.
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3.The early Spaniards established a chain of mission _________the local population along the San Antonio River.
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4.It was common practice then that when the store owners wanted to go on vacation they simply _________
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5.As they didn’t have relatives or friends there they often _________around nearby malls when they got bored.
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6.To make a birthday card, you can simply cut out some funny or pretty pictures from magazines, _________them _________a piece of card and then write your message inside.
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7.She picked up the receiver and, _________ asking the caller to hold on, went off to tell Jack that he was wanted on the phone.
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8.To relax himself for a little while, he rose from the computer desk, walked across the room towards the window and stretched both arms upwards and _________.
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9.The new product has a pair of small loudspeakers fitted inside, which you can easily _________ your computer’s sound card.
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10.Music in fact is a _________language of a non-verbal nature which is rich in expression.
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11.This _________is designed to show at a glance how many rooms have been rented out and how many are still available.
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12._________ glorious sunshine, the boundless stretch of corn fields looked an impressive sight.
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1.The cook put the meat on a plate, _________it with salt and pepper, wrapped up the plate in aluminum foil铝箔 and then placed it in the oven to roast.
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2.Every waking moment we talk to ourselves about the things we experience. Our self-talk, the thought we communicate to ourselves, _________control the way we feel and act.
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3.John made everyone laugh when he got the words _________and referred to himself as “my husband’s wife”.
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4.You can’t live a perfect day without doing something for someone who will perhaps never be able to _________you.
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5.Because the Earth is a sphere, sailors _________only can view other ships to a distance of about 13 miles before those ships seem to disappear into the horizon.
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6.Johnson dismissed _________ideas lightly as no good on several occasions.
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7.One tends to believe whatever one repeats to oneself sufficiently often, whether the _________be true or false.
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A. “88 ”
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C. “837”
D. “873”
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19.物体里的电荷朝一定方向运动就形成( ) 。《车辆电工》P3___
A. 电流
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C. 交流电
D. 直流电
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A. 电流
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C. 交流电
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22.电源内部推动电流的力量叫做电源（ ）。《车辆电工》P4___
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25.同一材料的导线，在粗细相同的情况下，（ ）。《车辆电工》P5___
A. 导线越长，电阻越大
B. 导线越长，电阻越小
C. 导线越短，电阻越大
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【单选题】
27.由欧姆定律定律变换式可知：一段导体的电阻与其两端所加的（ ）。《车辆电工》P6___
A. 电压成正比
B. 电流成反比
C. 电压成正比，电流成反比
D. 与电压、电流无关
【单选题】
28.将电阻R1、R2、R3串联起来后接到电源上，其总电压为（ ）《车辆电工》P6___
A. U=U1+U2+U3
B. U=U1=U2=U3
C. U=（U1+U2+U3）/2
D. 无法确定
【单选题】
29.导体材料电阻率越大，导电（ ）。《车辆电工》P6___
A. 越好
B. 越差
C. 不变
D. 无法确定
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30.下列材料中，电阻率最大的（ ）。《车辆电工》P6___
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31.在串联电路中，流过电阻的（ ）相等。《车辆电工》P7___
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32.并联电路各电阻两端（ ）相同。《车辆电工》P7___
【单选题】
33.电路中串联的电阻越多，其等效电阻越（ ）。《车辆电工》P7___
A. 越大
B. 越小
C. 不变
D. 无法确定
【单选题】
34.电路中并联的电阻越多，其等效电阻越（ ）。P7___
A. 越大
B. 越小
C. 不变
D. 无法确定
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35.电路的电阻一定时，电阻所消耗的电功率与电阻两端电压的平方成（ ）。《车辆电工》P9___
A. 正比
B. 反比
C. 不变
D. 无法确定
【单选题】
36.电气设备在额定电压消耗额定功率时的工作状态，称为（ ）。《车辆电工》P9___
【单选题】
37.用来储存电荷的容器叫（ ）。《车辆电工》P10___
A. 电感器
B. 电容器
C. 电量器
D. 电流器
【单选题】
38.直流电路中，电容相当于起到（ ）作用。《车辆电工》P10___
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39.电容器不论是充电或放电，其两端的（ ）是不能突变的，只能随时间从一个数值过渡到另一个数值。《车辆电工》P11___
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40．环形电流的方向跟它的磁力线方向之间的关系，可用（ ）来判定。《车辆电工》P13___
A. 右手定则
B. 左手定则
C. 欧姆定律
D. 牛顿第一定律
【单选题】
41.用左手定则判定通电导体在磁场中的（ ）。《车辆电工》P15___
A. 受力方向
B. 受力大小
C. 电流方向
D. 电流大小
【单选题】
42.减少涡流的办法是铁芯间彼此（ ）。《车辆电工》P19___
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43.交流电是由（ ）产生的。《车辆电工》P19___
A. 交流发电机
B. 直流发电机
C. 直流电动机
D. 交流电动机
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44.直流电路中，电感相当于起到（ ）作用。《车辆电工》P22___
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45.交流电路中无功功率的“无功”的实质是（ ）。《车辆电工》P23___
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46.DC600V电源漏电保护值出厂时预设为( )mA。《客车DC600V供电系统原理与检修》P99___
A. 100
B. 120
C. 150
D. 200
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47.三相电源相电压是对称的，即有效值相等，仅相位互差（ ）°。《车辆电工》P27___
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48.交流接触器有（ ）对主触点和若干辅助触点。《车辆电工》P43___
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49.用万用表检测晶体二极管时，如果二极管的正、反电阻都接近于（ ），说明该二极管内部断路损坏。《车辆电工》P57___
A. 无穷大
B. 0Ω
C. 相差不大
D. 相差１kΩ
【单选题】
50.用万用表检测晶体二极管时，如果正、反向电阻均为（ ）Ω，说明明该二极管已被击穿短路。《车辆电工》P57___
A. 无穷大
B. 0Ω
C. 相差不大
D. 相差１kΩ
【单选题】
51.场效应管是电压控制型元件，它有（ ）个电极《车辆电工》P63___
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52.电气电路图中，保护器件的字母代码是（ ）。《车辆电工》P86___
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53.电气电路图中，电阻的字母代码是（ ）。《车辆电工》P86___
【单选题】
54.电气电路图中，电动机的字母代码是（ ）。《车辆电工》P86___
