A.小于某粒徑之土質量百分數(shù) B.大于某粒徑的土質量百分數(shù) C.各粒徑區(qū)間的土質量百分數(shù) D.各粒徑區(qū)間的土質量百分數(shù)的對數(shù)值
A.5% B.20% C.15% D.10%