A.21% B.16% C.11% D.6%
A.0.01g/cm3 B.0.02g/cm3 C.0.03g/cm3 D.0.04g/cm3
A.分3層,每層25擊 B.分3層,每層94擊 C.分3層,每層98擊 D.分5層,每層56擊