【单选题】
Having practiced so many times, I feel very ___ of my ability to deliver the presentation successfully.
A. satisfied
B. incredible
C. confident
D. enthusiastic
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相关试题
【单选题】
The university decided to increase the ___ of the lecture hall, which has only 200 seats.
A. ability
B. capacity
C. facility
D. faculty
【单选题】
Smart phones – with cameras and color screens – can ___ images and data using wireless network technology.
A. evolve
B. depart
C. transmit
D. assure
【单选题】
Don’t take someone you get to know from the Internet to your house no matter how ___ he sounds.
A. bold
B. genuine
C. flexible
D. available
【单选题】
This kind of exercise will ___ your creativity, renew your energy, and unlock your potential.
A. bind
B. yield
C. embrace
D. stimulate
【单选题】
I’ll be happy to help you, ___ you won’t take up too much of my time.
A. as well as
B. as long as
C. as far as
D. as soon as
【单选题】
We teachers do not consider it wise to ___ our students with all sorts of exams, tests and quizzes.
A. load
B. annoy
C. sample
D. explore
【单选题】
He makes his students ___ knowledge through various kinds of interesting activities.
A. study
B. learn
C. achieve
D. acquire
【单选题】
For years, scientists have debated the ___ dangers of building another nuclear plant after the terrible accident.
A. available
B. potential
C. fascinating
D. genuine
【单选题】
It was a worthwhile attempt ___ it failed to achieve its purpose that we had hoped for.
A. in the end
B. now that
C. all at once
D. even though
【单选题】
Travel in space can be very exciting; ___, it can also be boring and lonely at times.
A. so
B. however
C. thus
D. therefore
【单选题】
Politicians should not ___ in business affairs that might affect their political judgment.
A. engage
B. embrace
C. depart
D. treasure
【单选题】
I wish to ___ a master’s degree in electric engineering after I graduate from college.
A. pledge
B. explore
C. pursue
D. approach
【单选题】
There is no greater importance ___ cultivating independence in children.
A. in
B. than
C. of
D. with
【单选题】
He has made it very clear ___ we should observe the new rules.
A. what
B. which
C. those
D. that
【单选题】
It was when I read his letter ___ I realized he had given me huge help.
A. that
B. then
C. before
D. after
【单选题】
Don’t worry too much, Jane. Your son ___ home already. Let’s go back and check it out.
A. returned
B. will return
C. has returned
D. may have returned
【单选题】
I believe friendship is an essential element of making a healthy, ___ life.
A. flexible
B. rewarding
C. wealthy
D. inquisitive
【单选题】
___ they have written about the behaviors of animals is hardly anything new.
A. That
B. This
C. What
D. Which
【单选题】
No other drugs are as good as this one; it must have been based on a(n) ___ formula (配方).
A. enormous
B. stimulating
C. unique
D. overwhelming
【单选题】
Mothers tend to be too ___ toward their children. They should let them see more of the worl D.
A. hopeful
B. protective
C. modest
D. encouraging
【单选题】
The investigation ___ evidence of a large-scale illegal trade in wild birds.
A. uncovered
B. outweighed
C. overwhelmed
D. evolved
【单选题】
Poor Laura! I feel so sorry for her. When she fell, she hurt her arm and, ___, broke her glasses.
A. in advance
B. in addition
C. over time
D. on the other hand
【单选题】
Showing some sense of humor can be a(n) ___ way to deal with some stressful situations.
A. genuine
B. available
C. effective
D. favorite
【单选题】
It will be worth the efforts even if you fail; the rewards you ___ will be great.
A. reap
B. boast
C. assure
D. cultivate
【单选题】
He suggested transporting the supplies by air. But it is absolutely ___, for it will cost too much.
A. unusual
B. uncertain
C. impractical
D. impressive
【单选题】
The newspaper didn’t mention the ___ of the damage caused by the fire.
A. range
B. level
C. extent
D. quantity
【单选题】
Do you ___ her novels as serious literature or as mere entertainment?
A. classify
B. notify
C. simplify
D. justify
【单选题】
He doesn’t ___ of buying a house this year because the bank has refused to lend him any money.
A. afford
B. make the most
C. run out
D. stand a chance
【单选题】
If you don’t ___ cooking today, we can go out to eat at the new restaurant.
A. would like
B. go on with
C. feel like
D. figure out、
【单选题】
Bullying (恃强欺弱) can ___ a climate of fear and anxiety in school, and prevent students from focusing on their schoolwork.
A. keep back
B. give rise to
C. feel like
D. make use of
【单选题】
Science can now ___ many things which were thought to be mysterious by ancient people.
A. care for
B. lay out
C. account for
D. set up
【单选题】
The school has ___ many after-class activity groups for the pupils to make their spare time more colorful.
A. set up
B. set off
C. set out
D. set down
【单选题】
When he was a small kid, he ___ from his peers because he could read fast and remember whatever he rea D.
A. showed off
B. worked out
C. stood out
D. straightened up
【单选题】
The fall in the number of deaths from heart disease is generally ___ improvements in diet.
A. put up with
B. attributed to
C. added to
D. replaced with
【单选题】
We can be partners for now, but ultimately you have to ___ to develop a new software for our project.
A. keep up
B. fire off
C. make sense
D. take the lead
【单选题】
Emotional Intelligence (情商) could be of practical use in many ___ such as how companies decide which job applicant to hire, how parents should raise their children, how schools should teach the students, and so on.
A. aspects
B. disciplines
C. structures
D. opportunities
【单选题】
The teacher should praise students for their correct answers and also suggest ___ possibilities.
A. unlimited
B. unique
C. alternative
D. essential
【单选题】
In some classrooms, desks are arranged in a U-shape, so the teacher can ___ easily with the students.
A. interrupt
B. interact
C. interpret
D. interview
【单选题】
Computer technology ___ individuals to educate themselves and adapt to a constantly changing job market.
A. lets
B. makes
C. enables
D. provides
【单选题】
Our hope for an enjoyable dinner was instantly ___ when the waiter dropped a salad plate on my hea D.
A. spoiled
B. restricted
C. exploded
D. vanished
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【填空题】
13. 电气原理图由___和___组成。
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14. 国家标准规定，原理图中各元器件触点，均按___和 ___的自然状态下画出。
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15. 电气原理图中，组合开关、主令控制器、万能转换开关按手柄处于___的状态画出, 保护开关处于___状态画出。
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16. 电气安全包括___安全和___安全。
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17. 保证电气安全主要有___措施和___措施两种。
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18. 工厂低压电工在每次操作前都必须用___或___对电线、电器进行验电。
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19. 国家标准规定的安全电压等级是6V 、12V、___、___和42V。
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20. 机床上的低压照明灯,其电压不应超过___，在容器内工作时,照明电压应选用___伏。
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21. 电流对人体的伤害形式主要有___和___
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22. 电流对人体的致命电流为___、安全电流为___
【填空题】
23. 人体的触电形式主要有___、___和跨步电压触电。
【填空题】
24. 设备不停电的安全距离，10KV是___米，35KV是___米。
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25. 高压设备发生接地故障时，室内不得接近故障点___米以内，室外不得接近故障点___米以内。
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26. 凡离地面___以上的地点进行工作时，都视为高空作业，应使用___。
【填空题】
27. 接地种类分为___接地，___接地和重复接地。
【填空题】
28. 工作接地的作用是___和___。
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29. 重复接地的作用：三相四线系统中，___时，进一步降低发生单相碰壳短路时___。
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30. 发现有人触电，应首先___，然后立即___。
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31. 发现电器失火紧急事故时，应首先___，然后___。
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32. 刀开关主要用途是___,不能___。
【填空题】
33. 低压断路器又称自动空气开关，是非常重要的电器，它相当于___、熔断器 、___和欠电压继电器的组合。
【填空题】
34. 低压断路器又称自动空气开关，它除具有开关作用外，还具有___、___、欠压和漏电保护的作用。
【填空题】
35. 组合开关的主要用途是机床电源的___、用来直接控制小容量电动机的___。
【填空题】
36. 熔断器的主要作用是___，还可以起到使用电设备与电源___。
【填空题】
37. 熔断器图形符号是___，文字符号是___。
【填空题】
38. 交流接触器的主要结构由___、触头系统 和___组成。
【填空题】
39. 交流接触器的主要作用是___，还具有___和欠压保护 功能.
【填空题】
40. 交流接触器辅助常开触点的图形符号是___，文字符号是___。
【填空题】
41. 中间继电器的主要作用是___，其触点额定电流一般为___。
【填空题】
42. 中间继电器常开触点的图形符号是___，文字符号是___。
【填空题】
43. 热继电器的主要作用是___，其文字符号是___。
【填空题】
44. 时间继电器按延时方式分，主要有___和___。
【填空题】
45. BK、JBK型机床控制变压器常用的输出电压有：6.3V___、___、___、110V。
【填空题】
46. 控制按钮是一种由人体的___而进行操作的开关，主要安装在___。
【填空题】
47. 一般按钮常开触点的的图形符号是___, 文字符号是___。
【填空题】
48. 急停按钮常闭触点的的图形符号是___, 文字符号是___.
【填空题】
49. 旋转按钮常开触点的的图形符号是___, 文字符号是___。
【填空题】
50. 接近开关常开触点的图形符号是___，文字符号是___。
【填空题】
51. 行程开关由___来控制开合，以控制其运动方向和行程的自动控制电器，主要安装在___。
【填空题】
52. 行程开关常开触点的的图形符号是___,文字符号是___。
