單項(xiàng)選擇題木質(zhì)吊頂施工中,大龍骨應(yīng)按設(shè)計(jì)標(biāo)高起拱,如設(shè)計(jì)無要求時(shí),起拱一般為房間跨度的()。

A.1/100~1/200
B.1/200~1/300
C.1/300~1/400
D.1/400~1/500