A.≥1700kg/m3 B.≥1800kg/m3 C.≥1900kg/m3 D.≥2000kg/m3
A.不低于160mm B.100mm~150mm C.160mm~200mm D.150mm~1850mm
A.210kg/m3 B.180kg/m3 C.225kg/m3 D.250kg/m3
