【判断题】
危险源辨识范围应包括规划、设计、建设、投产、运行等各个阶段。
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【判断题】
风险点划分应当遵循大小适中、便于分类、功能独立、易于管理、范围清晰的原则。
【判断题】
重复性隐患排查是隐患排查主要类型之一。
【判断题】
重大隐患的治理应先编制隐患评估报告书。
【判断题】
企业双体系建设过程中，风险等级判定应遵循从宽从低的原则。
【单选题】
I often _______ to work.
A. ride my bike
B. by bike
C. on bike
D. by a bike
【单选题】
—_______ Lin Tao go to Hangzhou?
—By taxi.
A. How
B. How do
C. How does
D. How far
【单选题】
There is a small house in the middle of the lake.
You can get there _______．
A. by boat
B. by subway
C. by bus
D. on foot
【单选题】
Most of us _______ bikes to school.
A. takes
B. rides
C. take
D. ride
【单选题】
---I walk to school every day，_______？
--- I ride my bike.
A. How are you
B. What are you
C. How about you
D. How old are you
【单选题】
—_______ do you usually go to work?
—By bike.
A. How long
B. How far
C. How
D. When
【单选题】
—_______ do you do sports every day?
—For about four hours.
A. How many
B. How long
C. How far
D. How soon
【单选题】
—_______ is it from here to the train station? —About six kilometers.
A. How long
B. How far
C. How much
D. How many
【单选题】
I often go to work _______．
A. by bike
B. by a bike
C. ride the bike
D. on bike
【单选题】
It usually takes Jim three hours _______ the homework.
A. finish
B. finishing
C. to finish
D. finishes
【单选题】
—How can I go to the supermarket，Paul?
—_______ bike. It's not far from here.
A. On
B. By
C. In
D. With
【单选题】
—Lily is coming by ______ plane tomorrow.
—Let's go to ______ airport to meet her.
A. a；a
B. /；a
C. the；the
D. /；the
【单选题】
Her parents go to work ______ bus every morning.
【单选题】
—_______ is it from Beijing to Tianjin?
—It's about 137 kilometers.
A. How far
B. How long
C. How fast
D. How much
【单选题】
—_______ Jenny ______ to school?
—No，she doesn't.She goes by bike.
A. Does；walk
B. Does；on foot
C. Do; take
D. Do; by train
【单选题】
It takes me _______ hour to do it.
【单选题】
His school is 20 kilometers _______ from my school but we meet every week.
A. far
B. away
C. to
D. far to
【单选题】
—_______ is it from the village to your farm?
—About 10 minutes' walk.
A. How often
B. How soon
C. How long
D. How far
【单选题】
—How _______ does it take to get to school?
—It takes about 15 minutes.
A. long
B. much
C. many
D. far
【单选题】
—How does that boy go to school?
—_______．
A. In a ropeway
B. By a ropeway
C. On a ropeway
D. On ropeway
【单选题】
This is _______ boy.
A. a 11 years old
B. an 11-year-old
C. a 11-year-old
D. an 11 years old
【单选题】
The river runs ______ so we are afraid ______ the river.
A. quick；to cross
B. quickly；cross
C. quickly；to cross
D. quick；cross
【单选题】
It usually takes me about 20 minutes _______ my homework every day.
A. do
B. does
C. to do
D. doing
【单选题】
It's not easy _______ school on a ropeway.
A. to go
B. to go to
C. go
D. go to
【单选题】
—How are you going to the train station to meet your aunt?
—I'm going there _______ car.
【单选题】
Sam has a bike. He ______ it to school every day.
A. takes
B. rides
C. walks
D. drives
【单选题】
Our holiday is coming. Two _______ students of our school want to have a trip.
A. hundred
B. hundreds
C. hundred of
D. hundreds of
【单选题】
Look！There is _______ boy over there. Do you know him?
A. a 8-year-old
B. an 8-year-old
C. a 8 years old
D. an 8 years old
【单选题】
Kate is _________ girl. She's very happy at school.
A. a eight-year-old
B. a eight-years-old
C. an eight-years-old
D. an eight-year-old
【单选题】
Mike usually goes to school_________subway.
【单选题】
—Is this your bike，Jane?
—Yes，it is. I_________it to school every day.
A. get
B. ride
C. take
D. drive
【单选题】
Mom，my schoolbag is too old. Can you buy me a_________one?
A. new
B. big
C. small
D. short
【单选题】
Tina likes music and her_________is to be a great musician.
A. habit
B. work
C. dream
D. name
【单选题】
I'm busy today，so I'm_________that I can't go to your party in the afternoon.
A. happy
B. afraid
C. right
D. free
【单选题】
The workers will build a new railroad _________ the two cities.
A. since
B. between
C. as
D. during
【单选题】
We need to buy some fruit_________apples，pears and bananas.
A. about
B. with
C. like
D. for
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【单选题】
DDXL-34型防雷信号点灯转换单元满载时，其二次端子电压的误差应不大于额定电压值的_______。[322010101]___
A. 80%
B. 85%
C. 90%
D. 95%
【单选题】
DDXL-34型防雷信号点灯转换单元，副丝回路中的检流变压器工作时，其二次侧电流为_______。[321010101]___
A. 1mA～2mA
B. 1.5mA～3mA
C. 1.5mA～2.5mA
D. 2mA～4mA
【单选题】
DDXL-34型防雷信号点灯单元的防雷电压转移系数小于_______。[331010101]___
A. 1/200
B. 1/300
C. 1/400
D. 1/500
【单选题】
DZD多功能智能点灯单元副丝电压为主丝电压的_______。[332010101]___
A. 80%
B. 85%
C. 90%
D. 90～95%
【单选题】
DZD多功能智能点灯单元主、副丝断丝时，报警时间应不大于_______。[331010101]___
A. 5s
B. 10s
C. 15s
D. 20s
【单选题】
LED色灯机构发光二极管损坏数量达到_______时，不能影响信号显示的规定距离。[311010103]___
A. 10%
B. 20%
C. 30%
D. 40%
【单选题】
LED色灯机构的正常绝缘电阻应不小于_______。[321010103]___
A. 20MΩ
B. 30MΩ
C. 40MΩ
D. 50MΩ
【单选题】
ZXD型智能信号点灯报警装置点灯单元在输入电压范围内，冷丝冲击电流小于或等于_______。[321010102]___
【单选题】
ZXD型智能信号点灯报警装置点灯单元在输入电压范围内，软启动时间小于或等于_______。[321010102]___
A. 0.1s
B. 0.2s
C. 0.3s
D. 0.5s
【单选题】
CTCS-2列控系统出站有源应答器的信息丢失后，列控车载设备生成NBP为_______的核对速度曲线。[322000000]___
A. 20km/h
B. 30km/h
C. 50km/h
D. 55km/h
【单选题】
CTCS-2级车站的临时限速信息必须管辖到从执行点应答器至列车在执行点线路速度下的常用制动至_______的制动距离所需的数据。[322000000]___
A. 25km/h
B. 30km/h
C. 45km/h
D. 55km/h
【单选题】
在用BEPT向应答器写入数据时，应将BEPT置于应答器_______。[322000000]___
A. 正下方
B. 正上方
C. 正左方
D. 正右方
【单选题】
在用BEPT向应答器写入数据直至结束，大约需要_______。[311000000]___
A. 30s
B. 1min
C. 3min
D. 5min
【单选题】
在用BEPT向LKD1-T型车站列控中心LEU数据写入直至结束，大约需要_______。[311000000]___
A. 3min
B. 5min
C. 8min
D. 10min
【单选题】
CTCS-2列控系统应答器运行温度范围为－40℃～_______。[311010103]___
A. ＋50℃
B. ＋60℃
C. ＋70℃
D. ＋80℃
【单选题】
BE1K-800型扼流变压器牵引线圈中点允许通过连续总电流为_______。[322010101]___
A. 400A
B. 600A
C. 800A
D. 1000A
【单选题】
BE1K-800型扼流变压器牵引线圈和信号线圈的匝数比为_______。[321010103]___
A. 1：2
B. 1：3
C. 2：1
D. 3：1
【单选题】
一台BGY2-80变压器可同时供_______室外信号点灯变压器工作。[321010103]___
【单选题】
BGY2-80变压器的传输距离为_______。[321010103]___
A. 0～5km
B. 0～8km
C. 0～15km
D. 0～18km
【单选题】
当输入额定电压，变压器空载时，其二次端子电压的误差不大于端子额定电压值的±_______。[321010101]___
【单选题】
容量为30VA至100VA(包括100VA)的变压器满负载时，其二次端子电压不得小于端子额定电压值的_______。[311010101]___
A. 80%
B. 85%
C. 90%
D. 95%
【单选题】
DR系列多功能熔丝装置备熔丝断路时_______。[311010103]___
A. 红色指示灯点亮
B. 黄色指示灯点亮
C. 红色和黄色指示灯同时点亮
D. 红色和黄色指示灯都不点亮
【单选题】
DR-24多功能熔丝装置的最大工作电流_______。[322010102]___
【单选题】
JHJ-40型电源转换接触器触点位置不应有歪扭现象，应保持接触面在_______以上,并紧密接触。[321010103]___
A. 1/3
B. 1/2
C. 2/5
D. 2/3
【单选题】
JHJ-40型电源转换接触器三个主触点应同时闭合和分断，误差不大于_______。[321010103]___
A. 0.05mm
B. 0.3mm
C. 0.5mm
D. 1mm
【单选题】
JHJ-40型电源转换接触器磨损后的触头厚度不小于原厚度的_______。[321010103]___
A. 1/4
B. 1/2
C. 2/5
D. 2/3
【单选题】
D2系列交流接触器线圈长时间工作相对温升_______。[321010103]___
A. ≤40℃
B. ≤50℃
C. ≤60℃
D. ≤70℃
【单选题】
单相变压器电源电压不变，负载电阻增大，原边电流_______。[321010101]___
【单选题】
压敏电阻标称电压的选择，在交流回路中应不低于工作电压的_______。[322010101]___
A. 1.5倍
B. 2倍
C. 2.2倍
D. 2.5倍
【单选题】
提速道岔断相保护器DCBHQ输入电流为交流_______。[321010101]___
A. 0.5A～2A
B. 1A～3A
C. 1A～3.5A
D. 1A～4A
【单选题】
提速道岔断相保护器DBQ输入电流为交流_______。[321010101]___
A. 0.5A～2A
B. 1A～3A
C. 1A～3.5A
D. 1.5A～3.5A
【单选题】
提速道岔断相保护器DBQX输出电压为直流_______。[321010102]___
A. 16V～24V
B. 17.5V～28V
C. 24V～28V
D. 28V～32V
【单选题】
提速道岔断相保护器QDB-S断相输出电压为直流_______。[321010102]___
A. ≤0.1V
B. ≤0.2V
C. ≤0.3V
D. ≤0.4V
【单选题】
BZ4型变压器空载时，其二次端子电压的误差不大于端子额定电压值的_______。[321010101]___
A. ±10％
B. ±5％
C. 5％
D. 10％
【单选题】
BD1-7、BD1-10型变压器的作用是_______。[321010103]___
A. 变压
B. 隔离
C. 隔离变压
D. 升压
【单选题】
BZ4型变压器的一次线圈额定电压为_______。[321010101]___
A. 0.5V
B. 1V
C. 9V
D. 10V
【单选题】
BYD-60型变压器一次线圈空载电流不大于_______。[321010101]___
A. 0.011A
B. 0.01A
C. 0.1A
D. 0.012A
【单选题】
BYD-60型变压器二次线圈额定电流为_______。[311010101]___
A. 2.1A
B. 2A
C. 4.5A
D. 5A
【单选题】
BYD-60型变压器二次线圈电压为_______。[311010101]___
A. 1.5V～2.8V
B. 28V
C. 1.6V
D. 1.6V～28.1V
【单选题】
变压器的绝缘电阻，在非运用中用500伏MΩ表测量时，不得低于_______。[311010103]___
A. 20MΩ
B. 22MΩ
C. 24MΩ
D. 25MΩ
