The purpose of the deck seal in an inert gas system is to prevent（）. ["flammable vapors from entering machinery space","flue gas escaping to atmosphere","inert gas escaping to atmosphere","air entering inert gas system"]
内燃机由哪两大机构和五大系统组成？
当数字影片声音大小不合适时，需要调整功率放大器音量进行纠正。
用键盘打开菜单项，必须按住（），再按菜单项括号中的字母即可。 ["Ctrl","Alt","Shift","Ta"]
The purpose of inert gas systems aboard tankers is to（）. ["allow sufficient oxygen in the tank to sustain life","prevent outside air from entering the tank","provide more discharge pressure","comply with pollution regulatio"]
检验员的基本职能是什么？
