【单选题】According to the article, what is a numbers station? a kind of radio station that unusual music and songs a kind of radio station that transmits strange sounds and signals a kind of radio station that...
A.
a kind of radio station that unusual music and songs
B.
a kind of radio station that transmits strange sounds and signals
C.
a kind of radio station that broadcasts news about secret messages
D.
a kind of radio station that helps people solve difficult math problems
【多选题】If station are closed because of sudden large passenger flow, what should station officers do?
A.
A station officer should broadcast that the station is closed for the sudden large passenger flow reason.
B.
A station officer should calm the passenger and explain the reason for the closure of the station immediately.
C.
A station officer should follow the instructions and guide the passenger to leave the station in order or take the empty train to the next station.
D.
A station officer should stay away to protect himself.
【单选题】What term is used to refer to a station that initiates NBDP communicates with another station?.
B.
Information sending station.
C.
Information transmitting station.
【单选题】模拟式、 数字式传感器是按照( )来划分的。
【多选题】对于传感器的分类,可以从哪些角度来划分?
【单选题】数据封装就是将一组数据和对该数据的操作结合到一起而形成的一种抽象的数据类型,该数据类型称为
【多选题】If there is a passenger not feeling well in the station, what should station officers do?
A.
A station officer should come up and check the passenger out.
B.
A station officer should ask the ill passenger that if he needs some medicine or some rest.
C.
A station officer should call the ambulance if necessary.
D.
A station officer should do something to make the ill passenger feel comfortable with somebody else.