A.C9芳烴、苯、二甲苯 B.C9芳烴、甲苯、混合二甲苯 C.C9芳烴、苯、甲苯 D.苯、甲苯、混合二甲苯
A.1/2 B.1/3 C.1/4 D.1/5
A.1℃/min B.2℃/min C.1~2℃/min D.1℃±0.1℃/min