單項(xiàng)選擇題對跨度不小于4m的現(xiàn)澆鋼筋砼梁板,其模板應(yīng)按設(shè)計(jì)要求起拱,當(dāng)設(shè)計(jì)無具體要求時(shí),起拱高度宜為跨度的 ()

A.1\1000
B.1\10000
C.1\1000-3\1000
D.3\1000