边长为100mm的立方体普通混凝土试块，其标准立方体抗压强度换算系数为（） ["1.05","1.0","0.98","0.95"]
Fuel oil tank vents are fitted with a screen which will stop（）. ["oil from flowing out of the tank vent","air from entering the tank vent","vapors from leaving the tank vent","flames on deck from entering the tank vent"]
针刺时要掌握一定的深度、角度以免发生危险，除（）外，其他部位都不宜深刺。 ["眼区","胸背部脏腑所居之处","尿潴留患者小腹部","肺气肿患者胸部","四肢"]
Functions aboard a tanker or tank barge such as connecting, disconnecting, and topping off must be supervised by（）. ["any certificated tankerman","the master of the vessel","the officer of the watch","the person designated as person in charge"]
据经济史学家考证，是（）哲学家色诺芬在《经济论》中论述以家庭为单位的奴隶制经济管理时最先使用“经济”这一术语的。 ["古希腊","古罗马","古印度","意大利"]
药台工如何配制和添加浮选药剂？
