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【单选题】
乳磨牙早失的常见原因是A.
邻面龋
B.
牙齿固连
C.
慢性牙髓炎
D.
晚期龋被拔除
E.
外伤
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举一反三
【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?.
A.
Master station.
B.
Information sending station.
C.
Information transmitting station.
D.
Slave station.
【简答题】什么是抽象数据类型和类属抽象数据类型?
【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.
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