A.40 B.45 C.50 D.60
A.正己烷 B.2+3(v/v)二氯甲烷/正己烷 C.1+1(v/v)二氯甲烷/正己烷 D.二氯甲烷
A.1+9(v/v)乙醚/正己烷 B.2+3(v/v)二氯甲烷/正己烷 C.1+1(v/v)二氯甲烷/正己烷 D.二氯甲烷