A.構(gòu)造型 B.地表卸荷型 C.喀斯特型 D.混合型
A.少 B.較少 C.較多 D.不多
A.0.35s,0.40s,0.45s B.0.25s,0.30s,0.35s,0.45s C.0.25s,0.30s,0.35s,0.40s,0.45s D.0.30s,0.35s,0.45s