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【单选题】
检查口一般设在立较长的水平管道上,供立立管与横支管交接处有异物堵塞时,能的可开启的部分,关于检查口的描述,错误的是?A.
多层和高层的建筑，每隔两层要设一个检查口，检查口间距不易大于10米
B.
立管的最底层，设有卫生器具的两层以上建筑，坡顶建筑的最高层都必须设置检查口
C.
坡顶建筑的检查口可用通气口来代替
D.
检查口高度一般距地面1米，高于卫生器具上缘0.15米
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