由于同一原因而引起多次事故应如何考核？
If keep the fuel injection of main engine unchanged when ship is fouled, that will causeⅠ.The speed of main engine to be reduced Ⅱ.Ship speed to be reduced Ⅲ.The resistance torque of propeller to be increased Ⅳ.Trim at stern to increase（） Ⅰ + Ⅱ。 Ⅰ ~ Ⅲ。 Ⅰ ~ Ⅳ。 Ⅰ + Ⅱ + Ⅳ。
The circular steel structure installed around the propeller of a towboat is the（）. nozzle。 shroud。 strut。 hood。
即时报告的内容有哪些？
The bow thruster generally is ineffective at（）. over 3 knots headway。 at any speed astern。 at any speed ahead。 over 1 knot sternway。
以下哪个不是行政收尾的输出结果（）
