【单选题】
The author of the report is well___with the problems in the hospital because he has been working there for many years.
A. informed
B. acquainted
C. enlightened
D. acknowledged
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相关试题
【单选题】
The manager lost his ___ just because his secretary was ten minutes late.
A. mood
B. temper
C. mind
D. passion
【单选题】
Many Europeans___ the continent of Africa in the 19th century.
A. exploded
B. explored
C. exposed
D. expanded
【单选题】
If you hear such a rumor,___ it thoroughly.
A. seek
B. investigate
C. search
D. explore
【单选题】
The pressure ___causes Americans to be energetic, but it also puts them under a constant emotional strain.
A. to compete
B. competing
C. to be competed
D. having competed
【单选题】
Having decided to rent a flat, we ___ contacting all the accommodation agencies in the city.
A. set about
B. set on
C. set out
D. set up
【单选题】
The old couple decided to ___ a boy and a girl though they had three children of their own.
A. adapt
B. adjust
C. adept
D. adopt
【单选题】
Mike was being ___for violent tendencies.
A. contended
B. consulted
C. counselled
D. insulted
【单选题】
I will___ Mr. Walters on this point.
A. refer to
B. commit to
C. contribute to
D. defer to
【单选题】
What happens in the next few days is___to our success.
A. critical
B. critic
C. prior
D. valid
【单选题】
She won’t___that there is a problem.
A. confer
B. concern
C. acknowledge
D. contemplate
【单选题】
This offer is___ for travel before the end of April.
A. effective
B. ineffective
C. invalid
D. valid
【单选题】
___ to British universities depends on examination results.
A. Admittance
B. Entry
C. Admission
D.
E. ntrance
【单选题】
The database is only ___ by authorized managers.
A. proved
B. accessible
C. approved
D. access
【单选题】
This traditional ___ is of indigo blue.
A. clothes
B. diversity
C. costume
D. institution
【单选题】
These cigarettes are a ___ of the best tobaccos.
A. blend
B. band
C. mixture
D. mess
【单选题】
The tennis players need total ___ during play.
A. concentration
B. section
C. depression
D. energy
【单选题】
He ___ that he was innocent.
A. announced
B. declared
C. disclosed
D. admitted
【单选题】
Columbus discovered America but did not ___ the new continent.
A. seek
B. investigate
C. search
D. explore
【单选题】
The trees ___their foliage every year.
A. repeat
B. grow
C. refresh
D. renew
【单选题】
Make a list of the various ___.
A. options
B. choice
C. optional
D. samples
【单选题】
I am well aware that this is a ___ job.
A. rough
B. tough
C. wealthy
D. rogue
【单选题】
I found their kindness quite ___.
A. strong
B. overweening
C. keen
D. overwhelming
【单选题】
The captain wasn’t ___ on having him in the team.
A. eager
B. keen
C. overwhelmed
D. anxious
【单选题】
He was ___at the prospect of seeing them again.
A. thrilling
B. blessed
C. thrilled
D. emotional
【单选题】
They ___ against travelling at night in such a dangerous country.
A. consul
B. advocate
C. counsel
D. recommend
【单选题】
It is absolutely vital that food supplied should be ___.
A. sustained
B. enhanced
C. exhausted
D. maintained
【单选题】
He must have had an accident, or he ___ then.
A. would have been here
B. had to be here
C. should be here
D. would be here
【单选题】
It was essential that the application forms ___ back before the deadline (截止日期).
A. must be sent
B. would be sent
C. be sent
D. were sent
【单选题】
We ___ our breakfast when an old man came to the door.
A. just have had
B. have just had
C. just had
D. had just had
【单选题】
The bridge was named ___ the hero who gave his life for the cause of the people.
A. after
B. with
C. by
D. from
【单选题】
It wasn’t such a good dinner ___ she had promised us.
A. that
B. which
C. as
D. what
【单选题】
The road now ___two kilometers beyond the river.
A. develops
B. extends
C. expands
D. widens
【单选题】
It was claimed that the level of alcohol in the man’s blood was ___ to cause an accident.
A. sufficient
B. adequate
C. enough
D. accurate
【单选题】
Medical care reform has become this country’s most important public health ___.
A. question
B. stuff
C. matter
D. problem
【单选题】
His retail business in the city___ rapidly between the wars.
A. enlarged
B. extended
C. widened
D. expanded
【单选题】
Many frogs ___ the sound of their voice using special sacs(囊) in their throat.
A. amplify
B. widen
C. expand
D. enlarge
【单选题】
Some old people don’t like pop songs because they cannot ___ so much noise.
A. resist
B. sustain
C. tolerate
D. undergo
【单选题】
I have kept that portrait where I can see it every day, as it always ___ me of my university days in London.
A. recollects
B. reminds
C. recalls
D. invokes
【单选题】
The article suggests that when a person is under unusual ___ he should be especially careful to have a well-balanced diet.
A. weight
B. stress
C. press
D. nerve
【单选题】
You should hire a more ___ manager than the one you currently have.
A. sufficient
B. effective
C. respective
D. efficient
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【单选题】
CCBⅡ制动机“第二步闸” 全制位后:保压1min,列车管压力泄漏不大于___kPa。
【单选题】
CCBⅡ制动机“第二步闸” 全制位后:保压1min,制动缸压力变化不大于___kPa。
【单选题】
CCBⅡ制动机“第二步闸”全制位:制动缸___s增压到360kPa。
【单选题】
CCBⅡ制动机“第三步闸”初制位:充满风后,均衡风缸减压50kPa,列车管减压到均衡风缸压力的±10kPa,制动缸增压到___。
A. 70~110
B. 60~110
C. 50~100
【单选题】
CCBⅡ制动机“第三步闸”移至重联位:列车管减压至___kPa后保持。
A. 70~110
B. 55~85
C. 50~100
【单选题】
CCBⅡ制动机“第三步闸”移至重联位:制动缸增压至___kPa。
【单选题】
CCBⅡ制动机“第四步闸”单阀直接移至“全制位”:制动缸在___s上升到280kPa,最终为300±15kPa。
【单选题】
CCBⅡ制动机“第四步闸”单阀“全制”直接移至“运转”位:制动缸压力在3~5s降到___kPa以下。
【单选题】
CCBⅡ制动机“第四步闸”自阀移至“制动”位,均衡风缸减压100kPa,列车管减压到均衡风缸压力的±10kPa,制动缸增压到___kPa;
A. 230~250
B. 110~150
C. 230~300
【单选题】
DK-2制动机闭合控制电源柜上电空制动电源___s后,司机室制动显示屏的制动机状态指示灯将长亮,才能完成制动控制单元BCU的启动。
【单选题】
DK-2制动机自动制动控制器紧急制动后,机车速度为零时起制动机紧急状态锁定___s,制动显示屏倒计时结束后,才能缓解全列车。
【单选题】
CCB-Ⅱ制动系统中,响应列车管的减压量及小闸单缓指令,产生平均管压力的模块是___。
A. 16控制模块
B. 20控制模块
C. 13控制模块
【单选题】
CCB-Ⅱ制动系统中,产生制动缸压力的模块是___。
A. 制动缸控制模块BCCP
B. 列车管控制模块BPCP
C. 13控制模块
【单选题】
CCBII制动机20CP故障,___可以根据单独制动手柄的位置产生制动缸控制压力。
【单选题】
在没有电源和气源的情况下,高压隔离开关___状态。
A. 维持原有
B. 自动处于开放
C. 自动处于关闭
【单选题】
CCBII电子空气制动系统在本机模式下,16号管增加压力同列车管减少压力的比率为___。
【单选题】
制动盘摩擦面不允许有明显的台阶与沟槽、拉伤,但允许有1mm深的擦伤和小于___mm的凹面。
【单选题】
辅助变流器采用___方式。
A. 强制水冷
B. 强制风冷
C. 强迫油循环风冷
【单选题】
为提高装置小型化及冷却性能,牵引变流器采用强制循环___冷方式。
【单选题】
受电弓降弓时,从2m高度落下的降弓时间(至绝缘子底面):___s。
【单选题】
和谐型电力机车主断路器机械寿命___万次。
【单选题】
___参与对机车轴重转移进行补偿。
A. 主变流器控制装置
B. 辅助变流器控制装置
C. 电源充电控制装置
【单选题】
为防滑系统提供速度信号的传感器为___。
A. 牵引电机速度传感器
B. 车轴速度传感器
C. 双针表速度传感器
【单选题】
16CP控制模块中的APP作用电磁阀得电时,其作用为___。
A. 作用风缸通大气,作用风缸减压
B. 总风缸通作用风缸通路被关断,作用风缸保压
C. 总风通作用风缸,作用风缸增压
【单选题】
干燥器前后各有一个高压安全阀,干燥器前高压安全阀的控制压力为___kPa。
【单选题】
单独制动手柄位置包括运转位,通过制动区到达全制动位。手柄向前推为___作用。
【单选题】
关于列车管控制模块BPCP,下列说法错误的是___。
A. 列车管控制模块BPCP响应均衡风缸的压力变化,从而实现列车管的充风、排风及保压
B. 列车管控制模块BPCP相当于DK-1制动机的中继阀
C. 紧急制动时,列车管控制模块BPCP不动作88.主断路器开断容量( C )MVA。 A、200 B、400 C、600
【单选题】
均衡风缸控制模块ERCP上的无动力回送塞门DE打至“投入”位时,沟通的通路是___。
A. 均衡管与列车管
B. 列车管与平均管
C. 列车管与第二总风缸
【单选题】
均衡风缸控制模块ERCP中的作用电磁阀APP失电时,其作用为___。
A. 总风通均衡风缸的通路被关断,均衡风缸保压。
B. 均衡风缸通大气的通路被关断,均衡风缸保压。
C. 总风通均衡风缸,均衡风缸增压。
【单选题】
和谐型电力机车警惕装置动作,发出___指令。A、紧急制动 B、 常用制动 C、 卸载92.当原边网压高于32kV且持续( C )ms,四象限脉冲整流器和逆变器的门极均被封锁,输入回路中的工作接触器断开,同时向微机控制系统发出原边过电压信息。
【单选题】
闭合蓄电池开关,若控制电源柜上电压表显示___V时,机车无法升弓。
【单选题】
当停放制动风缸中风压达到___kPa以上,弹停装置缓解后允许行车。
【单选题】
和谐型电力机车受电弓升高到2m的升弓时间(自绝缘子底面):___s。
【单选题】
和谐型电力机车自动制动手柄位置包括运转位、初制动(最小减压位) 、全制动(最大减压位)、___、重联位、紧急位。初制动和全制动之间是常用制动区。
【单选题】
均衡风缸控制模块ERCP中的作用电磁阀APP得电时,其作用为___。
A. 总风通均衡风缸的通路被关断,均衡风缸保压。
B. 均衡风缸通大气的通路被关断,均衡风缸保压。
C. 总风通均衡风缸,均衡风缸增压。
【单选题】
LCDM采用液晶显示屏,带有8个功能键,用于___选择。
A. 菜单和功能
B. 电空配合模式
C. 弹停制动控制模式
【单选题】
和谐型电力机车均衡风缸控制模块(ERCP)本机状态下,响应自阀指令,控制均衡风缸压力及___压力。
【单选题】
和谐型电力机车的空转滑行保护、___控制等不参与重联控制。
【单选题】
16CP控制模块中的REL缓解电磁阀失电时,其作用为___。
A. 作用风缸通大气,作用风缸减压。
B. 作用风缸通大气通路被关断,作用风缸保压。
C. 总风通作用风缸,作用风缸增压。