Before using a fixed CO2 system to fight an engine room fire，you must（）. ["secure the engine room ventilation","secure the machinery in the engine room","evacuate all engine room personnel","All of the above"]
戈森定理的内容为（）。 ["边际效用递增规律","边际效用递减规律","边际效用相等规律","边际效用平衡规律"]
关于理想对人生的作用，下列（）说法是正确的。 ["理想是人生航程的灯塔确","理想是人生前进的动力","理想专属年青人","理想是人生的精神支柱"]
Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）. ["immediately above the level of the oil","at the top of the tank","in the vent riser","one meter from the deck"]
谁曾出资30万元人民币捐助了宁波大学李兴贵球场；还欣然受聘担任浙江省第九届大学生运动会宁大代表团名誉总教练，并拿出2万元人民币奖励为宁大赢得殊荣的全体运动员？（） ["李达三","李景芬","包玉刚","邵逸夫"]
用人单位应如何建立职工名册？
