单项选择题

一般情况下，管道的内横截面积至少应是预应力筋净截面积的（）倍。A.1．0～1．5B.1．5～2．0###S

A.1．0～1．5
B.1．5～2．0
C.2．0～2．5
D.2．5～3．0

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一般情况下，管道的内横截面积至少应是预应力筋净截面积的（ ）倍。A.1．0～1．5B.1．5～2．0###S