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【单选题】
室内消火栓给水系统由消火栓、水龙带、水枪、消防水泵结合器、消防管道和水源等组成,其中消防 水泵结合器的作用是( )。A.
启动消防水泵
B.
连接消防水箱（水池）向室内供水
C.
连接消防水车向室内消防管网供水
D.
连接室外消防给水管道
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