下列哪一项是现场管理的内容（）。 ["生产现场质量管理","生产现场成本控制","作业管理","物流管理","现场安全管理"]
Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （） ["increasing the quantity of starting air","increasing the lube oil pressure","heating the engine fuel supply","heating the engine coolant"]
霍尔效应的原因是（） ["电流在磁场中受到洛仑兹力","霍尔元件在磁场中感生出电动势","霍尔元件在磁场中受到哥氏力","霍尔元件在磁场中受到重力"]
关于酶的下列说法中哪个是对的？（） ["假若酶的三维结构被瓦解，那么它的正常活性就会部分或全部丧失","酶提供使反应开始所必需的活化能","酶活性与温度和pH无关","一个酶分子只起一次作用，然后就被破坏了"]
The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（） ["Faulty thermostatic bypass valve","Eroded zinc pencils in the heat exchanger","Steam formation in the expansion tank","Excessive leakage from jacket water pump seal"]
典型配电自动化系统由哪几部分构成？
