【单选题】【消耗次数：1】
室内消火栓系统的用水量设计是能够（ ）。
①
保证着火时建筑内部所有消火栓均能出水
②
保证2支水枪同时出水的水量
③
保证同时使用水枪数和每支水枪用水量的乘积
④
保证上下三层消火栓用水量
参考答案：
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