选择题:A.ab段:DN50mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.015 B.ab段:DN75mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.020 C.ab段:DN75mm,通气立管(T):DN75mm,ef段:DN150mm,坡度:i=0.020 D.ab段:DN75mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.015 题目分类:公用设备师 题目类型:选择题 号外号外:注册会员即送体验阅读点! 题目内容: A.ab段:DN50mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.015B.ab段:DN75mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.020C.ab段:DN75mm,通气立管(T):DN75mm,ef段:DN150mm,坡度:i=0.020D.ab段:DN75mm,通气立管(T):DN100mm,ef段:DN150mm,坡度:i=0.015 参考答案: 答案解析: