【单选题】When being assisted by an ice breakerit is important to maintain a continuous listening watch on()and to maintain a proper lookout for sound and visual signals.
A.
the appropriate VHF channel
B.
the HF SSB voice channel
C.
the appropriate SART band
D.
the appropriate EGC channel
【单选题】【单选】As required by COLREG, all ships shall ______ a proper radar lookout if it is available onboard to obtain early warning of risk of collision.
【单选题】投资1000美元一年以后所得的利息是100美元,在这期间价格上涨了5%,实际利息率是( )。
【多选题】内部提升制度具有的优越性表现在 ( ) 。
【单选题】JavaScript 中的DOM节点类型不包括: