A.10%~40% B.5%~20% C.2%~l6% D.1%~l0%
A.7 B.8 C.9 D.10
A.石灰岩 B.沉积岩 C.花岗岩 D.大理岩
A.20%~70% B.25%~75% C.30%~80% D.35%~85%
A.抗压 B.抗剪 C.抗扭 D.抗拉