【单选题】
A pair of spectacles ________ what I need at the moment.___
A. is
B. are
C. has
D. have
查看试卷，进入试卷练习
微信扫一扫，开始刷题
相关试题
【单选题】
I fell and hurt myself while I ________ basketball yesterday.___
A. was playing
B. am playing
C. play
D. played
【单选题】
Don't forget _________ the window before leaving the room.___
A. to have closed
B. to close
C. having closed
D. closing
【单选题】
Twenty people were______ wounded in the air crash.___
A. quickly
B. wrongly
C. bitterly
D. seriously
【单选题】
The top of the Great Wall is ________ for five horses to go side by side.___
A. wide
B. so wide
C. wide enough
D. enough wide
【单选题】
Nancy is considered to be _________ the other students in her class.___
A. less intelligent
B. the most intelligent
C. intelligent as well
D. as intelligent as
【单选题】
She is not only my classmate __________ also my good friend.___
A. or
B. but
C. and
D. too
【单选题】
I would like to do the job ________ you don't force me to study.___
A. in case
B. although
C. though
D. as long as
【单选题】
__________ she survived the accident is miracle.___
A. What
B. That
C. As
D. Which
【单选题】
I often see _________ the road on his way home.___
A. he cross
B. him cross
C. him crossed
D. he crossing
【单选题】
The workers are busy __________ models for the exhibition.___
A. to make
B. with making
C. being making
D. making
【单选题】
The higher the temperature, __________ the liquid evaporates.___
A. the faster
B. the more fast
C. the slower
D. the more slower
【单选题】
Australia is one of the few countries ___________ people drive on the left of the road.___
A. which
B. that
C. where
D. on which
【单选题】
The grey building is the place where the workers live, and the white building is the place where the spare parts _________ .___
A. are producing
B. are produced
C. produced
D. being produced
【单选题】
Once environmental damage ___________, it takes many years for the system to recover.___
A. is to do
B. does
C. had done
D. is done
【单选题】
We worked hard and completed the task ________.___
A. in the time
B. on the time
C. ahead of time
D. before time
【单选题】
I didn't expect you to turn __________ at the meeting yesterday.___
A. up
B. to
C. out
D. over
【单选题】
Mike is better than Peter _________ swimming.___
【单选题】
Eggs, though rich in nourishments, have ___________ of fat.___
A. a large number
B. the large number
C. a large amount
D. the large amount
【单选题】
His salary as a driver is much higher than _____________.___
A. a porter
B. is a porter
C. as a porter
D. that of a porter
【单选题】
I have been looking forward to__________ from my parents.___
A. hear
B. being heard
C. be heard
D. hearing
【单选题】
The manager will not __________ us to use his car.___
A. have
B. let
C. agree
D. allow
【单选题】
__________ her and then try to copy what she does.___
A. Mind
B. See
C. Stare at
D. Watch
【单选题】
It's bad __________ for you to smoke in the public places where smoking is not allowed.___
A. behavior
B. action
C. manner
D. movement
【单选题】
— I think John and Peter will.___
A. carry out
B. get through
C. take in
D. set aside
【单选题】
If she wants to keep slim, she must make a ________ in her diet.___
A. change
B. turn
C. run
D. go
【单选题】
___________ the War of Independence, the United States was an English colony.___
A.
B. efore B. At
C. In
D. Between
【单选题】
A police officer claimed he had attempted to _________ paying his fare.___
A. avoid
B. reject
C. refuse
D. neglect
【单选题】
He is not seriously ill, but only a _________ headache.___
A. obvious
B. delicate
C. slight
D. temporary
【单选题】
On average, a successful lawyer has to talk to several _________ a day.___
A. customers
B. supporters
C. guests
D. clients
【单选题】
What is the train _________ to Birmingham?___
A. fee
B. tip
C. fare
D. cost
【单选题】
He put forward a theory, _______ of great importance to the progress of science of technology.___
A. I think which is
B. which I think is
C. which is I think
D. I think it is
【单选题】
If the doctor had been available, the child ____________.___
A. would not die
B. could not have died
C. might not die
D. should not have died
【单选题】
The music sounded _______. I enjoyed every minute of it.___
A. well
B. boring
C. wonderfully
D. beautiful
【单选题】
Put it down, Richard. You mustn't read ______letter. ___
A. anyone's else's
B. anyone's else
C. anyone else's
D. anyone else
【单选题】
I saw that she was in difficulty with all those parcels, so I offered my_____.___
A. service
B. money
C. use
D. chance
【单选题】
We were all surprised when he made it clear that he _____________office soon.___
A. leaves
B. would leave
C. left
D. had left
【单选题】
The electric fan has blown away the terrible smell in the hall, ______?___
A. can't it
B. isn't it
C. hasn't it
D. doesn't it
【填空题】
In every cultivated language there are two great classes of words which, taken together, comprise the whole vocabulary. First, there are those words ___ which we become acquainted in daily conversation,
【填空题】
which we ___,that is to say, from the members of our own family and from our familiar associates,
【填空题】
and which we should know and use ___ we could not read or write.
推荐试题
【填空题】
对管道中流体压力的正确测量，所测得的压力值应是流体的___压力。 静
【填空题】
评定仪表品质好坏的技术指标是仪表的___、___和___。 精度等级，稳定性，灵敏度
【填空题】
电磁阀的工作原理是利用___直接带动___。 电磁铁产生的吸引力，阀门的启闭件___
【填空题】
所谓常开触点，是指按钮末被按下时处于___位置状态的触点。 断开
【填空题】
自动调节系统在动态中，被调参数随___的过程，称为自动调节系统的___或过渡过程。 时间变化，调节过程
【填空题】
动态偏差是指调节过程中___与___之间的最大偏差。 被调量，给定值
【填空题】
误将Ｋ型热电偶换成Ｅ型热电偶，温度指示应比实际值___。 高
【填空题】
接线盒周围的环境温度一般不应高于___℃。 45
【填空题】
热电偶的热电势是热电偶两端温度差的函数，是___的，所以在不同温域内温差相等，热电势并不相等。 非线性
【填空题】
在热工仪表及自动装置中，应采用___电缆。其型号、规格应符合设计要求，截面积一般不小于___。 铜芯，1m㎡
【填空题】
开关量变送器的死区有时称为差值，它是变送器的___和___之间的差值。 动作值，复位值
【填空题】
从干扰作用于仪表的形式上来分，可分为___、___。 横向干扰，纵向干扰
【填空题】
测量过程有三要素：一是___、二是___、三是___。 测量单位，测量方法，测量工具
【填空题】
测量滞后一般由___引起，克服测量滞后的办法是在调节规律中___。 测量元件特性，加微分环节
【填空题】
直接安装在管道上的仪表，宜在___安装，当必须与管道同时安装时，在___应将仪表拆下。 管道吹扫后压力试验前，管道吹扫前
【填空题】
安装压力表时，取样点的选择题应有代表性，不能将测点选在___的地方。 有涡流
【填空题】
金属保护管埋设时宜采用___，并应做___。 套管焊接，防腐处理
【填空题】
根据国家标准，工业自动化仪表用模拟直流电流信号是___，其负载电阻是___。 4-20mA，250-750Ω
【填空题】
当用仪表对被测参数进行测量时，仪表若不能及时地反映被测参数而造成的误差，称为___误差。 动态
【填空题】
校验仪表时，主要用___和___来判断仪表是否合格。 仪表精度，变差指标
【填空题】
行程开关采用___的方法测量物体的___，以获得行程信号。 直接接触，机械位移量
【填空题】
测量汽、水、油等介质的导管在仪表或变送器前均应装设___，除汽水差压测量有时用三角阀外，一般都采用仪表___。 二次阀门，针型阀
【填空题】
测量高压力时，介质最大工作压力一般不宜超过仪表量程的___。 3/5
【填空题】
普通硅油使用温度是___，密度为___，温度系数是___，25时的粘度___。 -40℃~150℃0.9340.001089.5mpA.s
【填空题】
高温硅油使用温度是___，密度为___，温度系数是___，25时的粘度___。 15℃~315℃1.0700.0005344~50mpA.s
【填空题】
高压力时用___膜片，低压力时用___膜片。 厚薄
【填空题】
补偿导线的功能___、___。 实现了冷端迁移降低了电路成本
【填空题】
雷达手操器与显示屏最大距离为___。 600mm
【填空题】
放射性强度的常用单位是居里，符号为___，表示在1秒钟内发生___次核衰变。 Ci3.7×1010
【填空题】
测量电缆电线的绝缘电阻时、必须将已连接上的仪表设备及部件___。 断开
【填空题】
测量管道在满足测量要求的前提下，应按___路径敷设。 最短
【填空题】
测量差压的正压管和负压管，应安装在___相同的地方。 环境温度
【填空题】
安装在爆炸危险环境的仪表、仪表线路、电气设备及材料.其规格型号必须符合___规定。 设计文件
【填空题】
防爆设备应有铭牌和防爆标志，并在铭牌上标明国家授权的部门所发给的___编号。 防爆合格证
【填空题】
本质安全电路及其附件，应有___色标志。 蓝
【填空题】
接地系统的连线应使用___绝缘电线或电缆，采用镀锌螺栓紧固，仪表盘、柜、箱内的接地汇流排应使用___，并有___固定。接地总干线与接地体之间应采用焊接。 铜芯铜材绝缘支架
【填空题】
仪表盘、柜、箱内各回路的各类接地，应分别由各自的接地支线引至接地汇流排或接地端子板，由接地汇流排或接地端子板引出接地干线，再与接地总干线和___相连。各接地支线、汇流排或端子板之间在非连接处应彼此___。 接地极绝缘
【单选题】
网络管理员在网络中捕获到了一个数据帧，其目的MAC地址是01-00-5E-A0-B1-C3。关于该MAC地址的说法正确的是___。
A. 它是一个单播MAC地址
B. 它是一个广播MAC地址
C. 它是一个组播MAC地址
D. 它是一个非法MAC地址
【单选题】
以下哪项不是CSMA/CD的工作原理？___
A. 边发边听
B. 延迟固定时间后重发
C. 冲突停发
D. 随机延迟后重发
E. 先听后发
【单选题】
主机的IPv4地址为200.200.200.201/30，拥有下列哪个IPv4地址的主机和其通信不需要经过路由器转发？___
A. 200.200.200.1
B. 200.200.200.202
C. 200.200.200.200
D. 200.200.200.203
