【单选题】【消耗次数：1】
若室外给水管网供水压力为300KPa，建筑所需水压400 KPa，且考虑水质不宜受污染，则应采取 （ ）供水方式。
①
直接给水
②
设高位水箱
③
设储水池、水泵、水箱联合工作
④
设气压给水装置
参考答案：
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