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【单选题】
关于给水系统的布置形式.正确的论述是(__)A.
统一给水系统造价低，应用最广泛
B.
分质给水系统水处理费用高，管网独立，也使管网的造价较高
C.
分压给水系统的水泵型号单一，长期运行电费较高
D.
分区给水系统应用最广
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【单选题】Robert found that it was most important to focus on work in order to be happy.
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