11. 下列何者之混合溶液最遵守拉午耳定律(Raoult’s law):即 Psolution = X × Psolvent, X = 溶劑莫耳分率? (A)苯–甲苯 (B)水–乙醇 (C)水–丙酮 (D)乙醇–正己烷