[单选题]当互见的船舶鸣放"二长二短"笛声表示船舶何种动态？

正确答案 ：D

本船请求从前船左舷追越

[单选题]急性胆囊炎胆石症解痉止痛时下列哪种用药是错误的？

正确答案 ：A

单独使用吗啡

[单选题]干度x=0的工质是指( )。

正确答案 ：B

饱和液

[单选题]In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to ().

正确答案 ：B

list until the center of buoyancy is aligned vertically with the center of gravity

[单选题]Re-circulating the fuel when the engine is stopped can______.①keep the fuel at the correct viscosity ②cool the injector

正确答案 ：C

①②

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