A.不宜小于0.8m和宜采用1:6 B.不宜小于1.5m和宜采用1:6 C.不宜小于0.5m和宜采用1:3 D.不宜小于1.5m和宜采用1:7
A.大于150mm B.小于150mm C.大于300mm D.小于300mm
A.不應(yīng)小于4跨,且不應(yīng)小于6m B.不應(yīng)小于3跨,且不應(yīng)小于4.5m C.不應(yīng)小于3跨,且不應(yīng)小于5m D.不應(yīng)大于4跨,且不應(yīng)大于6m