A、in
B、on
C、at
D、for
更多“A long blast to warn the vessels（）vicinity.”相关的问题
A、6 short blasts and 1 long blast B、long blast mare than 6 short blasts C、more than 6 short blasts and 1 long blast D、1 long blast of at least 10 seconds
A、3 short blasts of the ship's whistle B、1 short blast of the ship's whistle C、3 long blasts of the ship's whistle D、1 long blast of the ship's whistle
A、start the fire pump B、go to your man overboard station C、go to your lifeboat station D、stand by for collision
A、a blast of from five to seven seconds' duration B、a blast of from five to six seconds' duration C、a blast of from four to six seconds' duration D、a blast of from six to seven seconds' duration
A、more than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarm B、continuous sounding of the ship's whistle and the general alarm for at least 10 seconds C、1 short blast on the whistle D、alternating short and long blasts on the ship's whistle
A、A.start the fire pump B、B.go to your man overboard station C、C.go to your lifeboat station D、D.collision station
A、A.a blast of from five to seven seconds' duration B、B.a blast of from five to six seconds' duration C、C.a blast of from four to six seconds' duration D、D.a blast of from six to seven seconds' duration
A、A.More than six short blasts and one long blast on the whistle B、B.Continuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarm C、C.Three short blasts of the whistle supplemented by the same signal on the general alarm D、D.More than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm
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