西安交通大学《专业英语》在线作业一

奥鹏西安交通大学新学期作业参考

西安交通大学新学期《专业英语》在线作业-00001

1.A transformer is a device that can convert one ac voltage to another ac voltage through the action of _____.
选项A：an electric circuit
选项B：a magnetic field
选项C：an electric field
选项D：a coupling circuit
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2.The hydropower is well suited for switching according to _____ command to meet changing power needs.
选项A：a consumer’s
选项B：a user’s
选项C：a dispatcher’s
选项D：an operator’s
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3.These are all (_______) demands.
选项A：reasonable
选项B：available
选项C：logical
选项D：formal
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4.Lenin stressed that it is precisely the people who (_______) history.
选项A：invent
选项B：imagine
选项C：create
选项D：discover
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5.________ a concert next Saturday?
选项A：There will be
选项B：Will there be
选项C：There can be
选项D：There are
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6.—Are you sure that you’ve met him before? — ___I’m mistaken.
选项A：Unless
选项B：If
选项C：When
选项D：Though
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7.When John came in, she (_______) her talk with Linda and talked to him.
选项A：broke off
选项B：called off
选项C：carrird off
选项D：passes out
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8.An expansion slot is a long, narrow socket on the motherboard into which you can plug _____.
选项A：an expansion card
选项B：a modem
选项C：a network card
选项D：a sound card
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9.A computer’s microprocessor only understands _____ in binary form.
选项A：high-level languages
选项B：machine language
选项C：human languages
选项D：assembly language
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10.They thought the program was (_______) investigating．
选项A：worth
选项B：worthy
选项C：worthwhile
选项D：worthing
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11.These heavy walls expressed man's fear of the outer world and his need to find (_______) .
选项A：prevention
选项B：protection
选项C：preservation
选项D：preparation
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12.Be sure to (_______) your work at the end of the exam.
选项A：look over
选项B：hang up
选项C：set aside
选项D：catch sight of
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13.If they come, we ________ a meeting.
选项A：have
选项B：will have
选项C：had
选项D：would have
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14.The notebook computers use _____ as standard display equipment.
选项A：CRT display
选项B：LCDs
选项C：LED
选项D：TV screen
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15.The generator voltages are usually stepped up to the transmission voltage level by _____.
选项A：series capacitor
选项B：parallel reactors
选项C：step-up transformers
选项D：step-down transformers
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16.We go to the cinema (_______) a week.
选项A：often
选项B：once
选项C：seldom
选项D：usually
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17.The system’s characteristic equation can be used to determine _____ of a linear time-invariant system.
选项A：the stability
选项B：magnitude of the steady-state error
选项C：the controllability
选项D：the observability
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18.Oh, sorry to bother you. —– (_______) .
选项A：That's OK
选项B：No, you can't
选项C：That's good
选项D：Oh, I don't know
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19.The objective of the optimal economic operation of power systems is _____.
选项A：to minimize the total production cost
选项B：to maintain frequency constant
选项C：to maintain voltages constant
选项D：to ensure balance between generation and load
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20.(_______) finishing his homework, he had to stay home at the weekend.
选项A：Not having
选项B：Having not
选项C：Being not
选项D：Having not being
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21.——Excuse me, but there’s no smoking on this flight .——Oh , I ___that . Sorry, I won’t do it again.
选项A：don’t know
选项B：didn’t know
选项C：won’t know
选项D：haven’t known
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22.—Don’t you think hard work is what makes people succeed?— ___.
选项A：I couldn’t agree more
选项B：I hope so
选项C：I’ve got it
选项D：Wish you success
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23.Some schools teach but fail to (_______) their students.
选项A：educate
选项B：instruct
选项C：enlighten
选项D：editorial
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24.——I’m sorry I stepped outside for a break . I was very tired.——There’s no ___for this while you are on duty .
选项A：excuse
选项B：reason
选项C：cause
选项D：explanation
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25.___, and we’ll know the results of the contest.
选项A：Another 3 days
选项B：Three days later
选项C：After 3 days
选项D：In three days
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26.The proposal seems quite good, but I can’t easily (_______) without all the facts.
选项A：join
选项B：judge
选项C：say
选项D：speak
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27.Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only (_______)to his confusion.
选项A：extended
选项B：amounted
选项C：added
选项D：turned
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28.He was then the only ___among the___there.
选项A：person asleep, people present
选项B：asleep person, present people
选项C：person asleep, present people
选项D：asleep person, people present
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29.The teacher advised Joe to___before deciding to quit school.
选项A：think about
选项B：think twice
选项C：think up
选项D：think over
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30.So far is known, the original manuscripts of Shakespeare’s plays are no longer (_______) .
选项A：in wonder
选项B：in general
选项C：all in all
选项D：in existence
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31.Within industries, companies are always trying to develop products that are one step better than___ of other companies.
选项A：ones
选项B：that
选项C：those
选项D：all
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32.The DC-DC converts _____ input to _____ output.
选项A：direct current, alternating current
选项B：direct current, direct current
选项C：alternating current, alternating current
选项D：alternating current, alternating current
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33.The electric machine that operates at speeds above synchronous speed works in _____ region.
选项A：motoring
选项B：generating
选项C：plugging
选项D：stopping
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34.The wide application of operational amplifiers lies in advantage of using _____.
选项A：positive feedback networks
选项B：large open-circuit gain
选项C：negative feedback networks
选项D：small output impedance
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35.In the root-locus method the actual time response of a system can be obtained by means of _____.
选项A：the inverse Fourier transform
选项B：the inverse Laplace transform
选项C：the Fourier transform
选项D：the Laplace transform
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36.I believe we’ve met somewhere before.
— No, (_______) .
选项A：it isn’t the same
选项B：it can’t be right
选项C：I don’t think so
选项D：I’d rather not
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37.The advertisement said that an expanding company wished to (_______) a secretary at their head office.
选项A：explore
选项B：exploit
选项C：employ
选项D：accept
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38.The aim of our training is to teach the students to have the ability of tackling problems (_______) .
选项A：of their own
选项B：on their own
选项C：to their own
选项D：for their own
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39.My passport (_______) last month, so I will have to get a new one.
选项A：elapsed
选项B：expired
选项C：ended
选项D：terminated
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40.After stopping for a few minutes, the bus moved (_______) to its next stop.
选项A：forward
选项B：off
选项C：with
选项D：on
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41.We have come to a critical moment. You must take immediate (_______) .
选项A：act
选项B：action
选项C：activity
选项D：doings
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42.Her eyes were filled (_______) tears.
选项A：of
选项B：with
选项C：in
选项D：along
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43.“Have you seen Lao Wu recently?”
“It looks (_______) he would return home tomorrow.”
选项A：like
选项B：as
选项C：as if
选项D：that
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44.Could I use your dictionary for a moment? —–(_______).
选项A：It's well
选项B：It doesn't mattter
选项C：By all means
选项D：I have no idea
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45.1
选项A：A
选项B：B
选项C：C
选项D：D
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46.All the characteristics that distinguish birds (_______) other animals can be traced to prehistoric times.
选项A：to
选项B：between
选项C：for
选项D：from
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47.I would die (_______) marry him!" she screamed.
选项A：instead of
选项B：rather than
选项C：other than
选项D：more than
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48.— My best friend’s in a bad mood.— How about ____ her some flowers?
选项A：giving
选项B：given
选项C：to give
选项D：give
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49.I think English is as ____ as math.
选项A：important
选项B：importanter
选项C：more i奥鹏西安交通大学新学期作业参考mportant
选项D：most important
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50.In a coal-fired power plant, an electrostatic precipitator is used to remove _____ from the combustion gases.
选项A：solid particle
选项B：SO2
选项C：CO
选项D：water vapour
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