A.定標準 B.定數(shù)字 C.定位置 D.定量
A.90% B.95% C.93% D.97%
A.石英淺灰色厚層狀中粒砂巖 B.淺灰色中粒厚層狀石英砂巖 C.淺灰色厚層狀中粒石英砂巖 D.厚層狀中粒淺灰色石英砂巖