【判断题】
通过电阻上的电流增大到原来的2倍时,它所消耗的电功率也增大到原来的2倍
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断路器在接线安装前要先分清哪侧是进线侧,哪侧是出线侧
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电杆在线路的垂直方向发生的倾斜,若使用牵引工具正杆时,采取可靠安全措施,也可在线路不停电的情况下进行
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电源是将其他形式的能转换成电能的一种转换装置
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电气图上继电器的触点位置均是指“通电状态”
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雷电时,可以用兆欧表在停电的高压线路上测量绝缘电阻
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电压监测点必须装设自动记录型电压监测仪,连续不间断地进行监测统计和记录,并保证停电时永久不丢失已监测到的数据
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使用验电笔时验电前要先到有电的带电体上检验一下验电笔是否正常
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电压三角形、阻抗三角形、功率三角形都是相量三角形
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在终端杆上对导线弧垂进行调整时,应在横担两端导线侧做好临时拉线,防止横担因受力不均而偏转
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人工对水泥构件表面进行处理,应先清除裂纹处松动颗粒物,清除油污、杂质、灰尘
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配电变压器台的设置,其位置应在负荷中心或附近便于更换和检修设备的地段
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热缩电缆头的适应性广,可以用于室内、外,可用于各种电缆,可用于各种环境条件及狭小的空间
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制作电缆终端头,在安装应力管前,应清洁半导电层和铜带屏蔽表面,清洁线芯绝缘表面,确保绝缘表面没有炭迹
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电缆埋地敷设,在电缆下面应铺混凝土板或黏土砖
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在运动电荷的电荷量和速度大小一定的情况下,当电荷沿着与磁场方向平行的方向运动时,所受到的磁场力为最大
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三相负载作三角形连接时,线电压等于相电压
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允许电器设备在一定时间内安全工作的最大电压、电流或功率,分别叫做额定电压、额定电流或额定功率
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【单选题】
Almost half of that group will experience stress ___ enough to call for professional help.
A. tense
B. moderate
C. bearable
D. intense
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If you grow too fast your entire economy could completely shut down and bring growth to a(n) ___.
A. halt
B. cease
C. peak
D. epidemic
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I tried my best to drive inside in order to avoid the edges that might make me ___ the steep slope.
A. slip down
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When the driver heard that there was a bomb on the bus, he immediately ___ to the side of the highway and radioed the police.
A. put out
B. took off
C. pulled over
D. slipped off
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She was very ___ to become a manager in our customers’ office, but finally accepted our offer.
A. eager
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In the race, it looked as if he would be the first, but then another young man who was close behind him put on speed and ___ by a few seconds.
A. beat him for it
B. beat him to it
C. beat him up
D. beat it to him
【单选题】
It is really helpful to have someone like you that we can ___ and count on during difficult times.
A. lean on
B. get to
C. hang on
D. get by
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Women have a greater ability to ___ names with faces than men do, and they are also better at recalling lists.
A. associate
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C. engage
D. involve
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He was always ready to help others and managed to ___ his friends ____being hurt.
A. expose … to
B. confine …to
C. restrict … from
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Older people are less likely to be ___ their negative emotions (情绪) and more likely to focus on the positive.
A. reserved for
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C. beat up to
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I don’t have any bandage, so I have to ___ pressure to the wound to keep the bleeding down.
A. apply
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It is important that whichever candidate (候选人) is picked the loser should accept the defeat ___.
A. in advance
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___ that new homes cost more than older homes, but that is not true across the country anymore.
A. It used to be
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The boss ___ his employees to work longer hours as the company is dreadfully short of staff at present.
A. called on
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The president’s visit and ___ discussions led to a plan that aimed to improve the trade relations between the two countries.
A. emerging
B. subsequent
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The author ___ his general idea mainly through statistics and results obtained from a survey (调查) about auto customer services in the United States.
A. assumes
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People in this town starved, several buildings were bombed and crime ___ because you had to steal to eat.
A. eroded
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A. controversial
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C. characteristic
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Tom tried to justify his absence from the meeting by ___ that he had been ill that day.
A. admitting
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___ the huge financial benefits, biological companies have been rushing to set up laboratories and new research projects.
A. Aware
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Unfortunately, ___ lack of funds, the studies he began just two months ago, had to be ended early.
A. out of
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C. owing to
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With a good command of English, he soon got ___ to working with British people.
A. accustomed
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What needs to be ___ here is that language and culture interact, and that understanding of one requires understanding of the other.
A. altered
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Policies and organizations must be created to meet workers’ hopes, and to ___ new problems that inevitably arise between workers and managers.
A. compromise
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To keep the wheels of industry turning, we produce consumer goods in endless quantities, and, in the process, are rapidly ___ our natural resources.
A. ignoring
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【单选题】
As a person who loves peace, he is committed ___ realizing peace between countries.
A. of
B. about
C. for
D. to
【单选题】
Learning how to use chopsticks is easy for me, ___ learning how to conduct myself at the table is quite difficult.
A. whereas
B. however
C. therefore
D. besides
【单选题】
___ that the patient smokes 50 cigarettes a day, it would be reasonable to assume there is some lung damage.
A. To give
B. Giving
C. Given
D. Having given
【单选题】
Kenyan (肯尼亚的) women tend to vote for those who could provide them ___ the necessary food to live on.
A. of
B. with
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【单选题】
___ all obstacles and failures, the scientist continued doing his experiments day and night.
A. In spite of
B. In contrast to
C. As a matter of
D. As a result of
【单选题】
I’m willing to ___ that a larger car would have cost more, but I still think we should have bought one.
A. withdraw
B. indicate
C. abandon
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Manufacturing (制造) companies spend millions of pounds on advertisements, trying to ___ customers that their products are better than those of other companies.
A. confine
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He is not the right person for the project: he is not very technically minded and ___, he does not have the sense of responsibility.
A. instead
B. yet
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Death rates declined in many places, partly because of the ___ in hunger.
A. decrease
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【单选题】
In deciding whether or not a situation is safe, pilots must be taught to assume that the worst will happen, and then to ___ whether there is a risk or not.
A. absorb
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【单选题】
The worker was not worried as he knew that if he gave up the job, there would be ___ opportunities for him to work somewhere else.
A. formative
B. marginal
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The research shows the region might ___ overheating (经济过热), but the policymakers so far appear to be relatively relaxed about the future of the economy.
A. catch a glimpse of
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C. take a toll on
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【单选题】
Measures have been taken to ensure that no student will have to ___ of college for economic reasons.
A. lay out
B. cancel out
C. drop out
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Stress that is not treated can lead to significant medical illnesses, which ___ can lead to greater stress and even depression (抑郁症).
A. after all
B. in turn
C. on the contrary
D. at least
【单选题】
Narcissism (自恋) has its benefits in terms of self-belief and confidence, but it also tends to be ___ risky decision-making.
A. associated with
B. contrasted with
C. reserved for
D. relieved of