为了保证行车安全,凡是列车经过的道岔,不论对向的还是顺向的,都要和信号机实现联锁。

题型:判断题

问题:

为了保证行车安全,凡是列车经过的道岔,不论对向的还是顺向的,都要和信号机实现联锁。

考点:铁路信号工城市轨道交通信号工城市轨道交通信号工题库
题型:判断题

.某小区最近一段时间由于楼道灯的供电系统电压偏高,所用的路灯“220V40W”灯丝经常熔断,在电压暂时无法改变的情况下,为了延长楼道灯的使用寿命,小明所采取的下列方法切实可行的是:

A.换用一颗“220V60W”的灯泡替换原来的灯泡接入原电路中使用

B.换用一颗“220V15W”的灯泡替换原来的灯泡接入原电路中使用

C.换用两颗“220V40W”的灯泡并联后替换原来的灯泡接入原电路中使用

D.换用两颗“220V40W”的灯泡串联后替换原来的灯泡接入原电路中使用

题型:判断题

阅读理解

       Police officers have two main jobs. They help keep people safe and they protect people's property

(财产). They do these things in many ways. They answer calls for help. Some may direct traffic.  Others

try to find out how an accident happened. They try to catch criminals(罪犯). Police officers are the people whom we turn to for help when we feel unsafe.  They are the people we call when we have problems. 

       Being a police officer is not easy. The work is tiring and dangerous. They often fight with some bad

people. Sometimes those bad people carry knives or guns. They can hurt or even kill the police.

       Besides answering calls, the police also help people find out missing persons. They will do all they

can to find the persons.  Also,  when the police see a speeding car,  they will stop it. If they do not,  the

driver of the speeding car may have an accident and hurt other people.  When the police see a person

trying to break into a house, they will stop and question the person. If they do not, the person may steal

things from the house.

       Some police officers patrol (巡逻) in cars or on motorbikes. Some patrol on foot, especially in parks or busy streets. Others even use boats. Most of them have received special training to do with sudden or

special accidents.

       With the police, our lives can keep peaceful and safe.

1. What are the two major duties for police officers according to the passage?        

A. Keep people safe and protect people's property.  

B. Kill bad people and direct traffic.

C. Answer calls and fight with bad people.  

D. Look for missing persons and answer questions.

2. According to the passage, police officers help keep people safe in many ways EXCEPT ____.      

A. answering calls for help                

B. directing traffic  

C. catching criminals                      

D. finding missing dogs

3. The underlined word " speeding"means " _______" in Chinese.       

A. 正常行驶        

B. 超速行驶        

C. 减速行驶      

D. 低速行驶

4. From the passage we know that _________.        

A. being a police officer is very easy      

B. the police's work is not tiring or dangerous

C. we call the police when we feel safe    

D. most of the police have received special training

5. Which one is TRUE according to the passage?       

A. A speeding car can cause an accident.    

B. Most police officers patrol on foot.

C. We can't see police officers in parks.      

D. A person who is trying to open the door will be caught by the police.

题型:判断题

在计算机网络中使用MODEM,其主要作用是()。

A.实现数字信号的编码

B.把模拟信号转换为数字信号

C.把数字信号转变为模拟信号

D.实现模拟信号与数字信号之间的相互转换

题型:判断题

期货交易所向会员收取的保证金,可以用于会员的交易结算和期货公司的经营周转。( )

题型:判断题

施工企业定额,亦称施工定额,是进行企业经营和内部()的依据。

A.安全管理

B.经济核算

C.质量管理

D.人事工作

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