【单选题】【消耗次数：1】
仅用于防止火灾蔓延的消防系统是（ ）。
①
消火栓灭火系统
②
闭式自喷灭火系统
③
开式自喷灭火系统
④
水幕灭火系统
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【判断题】
气体灭火系统采用的是冷却、窒息（稀释氧气）、隔离（去除燃料）和化学抑制方法中的一种或多种方法。一般包括二氧化碳灭火系统、水蒸气灭火系统、氦气灭火系统和烟雾灭火系统、卤代烷灭火系统等
①
正确
②
错误
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