当按直接供水的建筑层数确定给水管网水压时,其用户接管处的最小服务水头,1层为( ),2层为( ),2层以上每增加1层增加( )。
Goods are carried by several of transport--on road or rail, by sea or air.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
下列工程中,属于市政公用工程二级建造师执业范围的是( )。
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