具有顶轴油泵的汽轮机，启动盘车前必须（）。并确定（）方可启动盘车。
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有机防水涂料为47t，需抽样检验数量为（）
A. 3批
B. 4批
C. 5批
D. 10批
As a licensed Merchant Marine Officer you are expected to（）.
A. obtain a weather forecast before setting out from port
B. listen to weather forecasts on the radio while enroute
C. understand all broadcast weather warning information
D. All of the above
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