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【单选题】
常用的网络地址有A、B、C三类。一个B类网络最多可以包含(30)主机，B类网络默认的子网掩码是(31)。A.
1600万个
B.
6万多个
C.
300个
D.
254个
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Task 3 Read the passage again and tick off the facts mentioned in the passage.(上)
A.
definition of business negotiations
B.
people’s attitudes toward an enquiry
C.
legal consequence of a firm offer
D.
differences between a quotation and an offer
E.
the possibility of rejecting an offer
【多选题】自动闭塞区段遇下列（）情况发车的行车凭证为绿色许可证。
A.
由未设出站信号机的线路上发出列车
B.
出站信号机故障时发出列车
C.
超长列车头部越过出站信号机发出列车
D.
通过信号机故障
【多选题】Task 3 Read the passage again and tick off the facts mentioned in the passage.(下)
A.
how to make a counter-offer
B.
the effects of a counter-offer
C.
definite number of offer and counter-offer rounds
D.
format of writing an acceptance letter
【多选题】自动闭塞区段车站发车，遇连续多架发车进路信号机故障或发车进路、出站信号机连续故障时，可填发（），并在调度命令用纸上按发车方向由近及远依次填写故障信号机名称，车站值班员签字，交给司机。车站按规定发车，列车凭绿色许可证越过注明的故障信号机。
A.
一张
B.
多张
C.
绿色许可证
D.
路票
【判断题】自动闭塞区段遇出站信号机故障时发出列车时,从监督器上不能确认第一个闭塞分区空闲时,车站应发给司机书面通知,司机以在瞭望距离内能随时停车的速度,最高不超过25 km/h,运行到第一架通过信号机,按其显示的要求执行。
A.
正确
B.
错误
【多选题】Task 3 You will hear a conversation. Tick which the following general topics are mentioned:
A.
The man is the sales manager of the company.
B.
The woman wants to be an assistant sales manager.
C.
The woman can come to the company at 2 P.M. tomorrow.
D.
The man is the assistant personnel manager.
【多选题】Task 1 Tick off the facts about Starbucks mentioned in the passage.
A.
It is a refreshing drink.
B.
It is an Italian coffee bar.
C.
Howard Schultz founded the company.
D.
There are 18,000 Starbucks all over the world.
E.
The name of the company comes from Moby Dick.
相关题目：
【多选题】自动闭塞区段遇下列（）情况发车的行车凭证为绿色许可证。
A.
由未设出站信号机的线路上发出列车
B.
出站信号机故障时发出列车
C.
超长列车头部越过出站信号机发出列车
D.
通过信号机故障