單項(xiàng)選擇題引入管穿越承重墻,應(yīng)預(yù)留洞口,管頂上部?jī)艨詹坏眯∮诮ㄖ镒畲蟪料萘?,一般為()米?/strong>

A.0.15~0.2
B.0.2~0.3
C.0.1~0.15
D.0.1~0.3