Flame screens are used to（）. ["contain flammable fumes","protect firefighters from flames","prevent flames from entering tanks","keep flames and sparks from getting out of an engine's exhaust system"]
城市内商业区的区位一般受以下因素的影响（）。 ["地理位置","地价","地点的便捷性","消费者的行为"]
天然气有哪些性质？
下列可能是财产保险的被保险人的是（） ["财产的所有者","财产的经营者","财产的使用者","财产的抵押者","财产的管理者"]
Fixed CO2 systems would not be used on crew’s quarters or（）. ["the paint locker","spaces open to the atmosphere","cargo holds","the engine room"]
对需要连接互联网的部门或个人，需经所在单位（指省局、市局、县级局）分管局领导和信息办分管局领导同意，由（）统一接入。任何部门或个人不得自行以各种方式接入。
