when you do the watch keeping in the engine room ,what should you be careful
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why is quick closing valves important to in engine room machineries ?how are
The three basic components of a fire are chain reaction, heat, fuel, and ____.
A. carbon monoxide
B. oxygen
C. carbon dioxide
D. any gaseous substance
当一国有________,国债在某年度下降。
A. 预算赤字
B. 平衡预算
C. 预算补充
D. 预算盈余
E. 没有相机抉择的财政政策
explain bilge and ballast pumping through ejector ?