9-10 根据以下双塔吸收的四个流程图,分别作出其平衡线和操作线的示意图(设吸收-|||-液最初不含溶质)并说明各自适用于哪些情况。-|||-xa-|||-ya ys y=-|||-xe ye-|||-1 2 1 2-|||-yb 少-|||-xb xb1 yxbz-|||-(I) (Ⅱ)-|||-ya y-|||-xa-|||-1 2 1 2-|||-yb-|||-y-|||-xb (Ⅲ) (IV)-|||-x ∀xb xc-|||-习题9-10附图