客船和大于500总吨的货船应配备1套船上通信与报警系统,供()之间的双向通信联系使用。
A、登乘站
B、应急控制站
C、集合站
D、重要位置
参考答案:A, B, C, D
____ that we all went out, lying in the sun.
A.So fine was the weather
B.So was the fine weather
C.The weather so fine was
D.So the weather was fine
ATM中异步就是( )
A.不同步
B.时分复用
C.虚电路
D.随机发送信元