中央信号装置分为事故信号和预告信号

Metro Pocket Guide

Metrorail (地铁)

Each passenger needs a farecard to enter and go out .Up to two children under age five may travel free with a paying customer .

Farecard machines are in every station .Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change.

Get one ticket of unlimited Metrorall rides with a One Day Pass .Buy it from a farecard machine in Metro stations .Use it after 9:30 a,m. until closing on weekdays , and all day on weekends and holidays .

Hours of service

Open 5am  Mon-Fri             7a.m  Sat-Sun

Close  midnight Sun-Thurs.          3a.m. Sat-Sun

Last train times vary .To avoid missing the last train , please check the last train time posted in the station.

Train times Posted in stations

Metrobus 

When paying with exact charge , the fare is $1.35.When paying with a SmatTripⓇcard , the fare is 1.25.

Fares for the senior/ disabled customers

Senior citizens 65 and older and disabled customers may ride for half the regular fare .On Metrorail and Metrobus , use a senior/disabled farecard or Smar/Trip Ⓡ card .For more information about buying senior .disabled farecards , farecard or SmarTripⓇcards and passes , please visit MetroOpensDoors .com or call 202-637-7000and 202-637-8000.

Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorall services by calling 202-962-1100.

Travel tips (提示)

. Avoid riding during weekday rush periods –before 9:30 a.m. and between 4and 6p.m.

. If you lose something on a bus or train or in a station, please call Lost &Found at 202-962-1195,

小题1:What should you know about farecard machines?

A．They start selling tickets at 9:30 a.m.

B．They are connected to change machines .

C．They offer special service to the elderly .

D．They make change for no more than $5.小题2:At what time does Metroarll stop service on Saturday ?

A．At midnight .

B．At 3 a.m.

C．At 5 a.m.

D．At 7a.m.小题3:What is good about a SmarTripⓇcard ?

A. It is convenient for old people .

B. It saves money for its users

C It can be bought at any train

D. It is sold on the Internet

小题4:Which number should you call if you lose something on the Metro?

A．202-962-1195

B．202-962-1100

C．202-637-7000

D．202-637-8000

当钢条靠近磁针的N 极时，N 极远离钢条，根据这一现象              [ ]

A．可以确定钢条原来一定有磁性，且钢条与磁针接近一端是N 极。

B．可以确定钢条原来一定有磁性，且钢条与磁针接近一端是S 极。

C．不能确定原来有没有磁性。

D．可以确定钢条原来一定无磁性。

制动闸板使用的是什么材质？硬度如何？

电网频率过高时，对汽轮机的影响表述错误的是（）。

A.引起汽轮机叶片断裂

B.增加汽耗

C.使循环水泵转速增加

D.使风机转速增加

价值规律调节社会劳动在各部门的分配是通过（）

A、价格始终同价值相等实现的

B、价格高于价值实现的

C、价格低于价值实现的

D、价格围绕价值上下波动实现的