この問題はどうやって解くのでしょうか？？？
Thread Content
16、精留塔の精留段の操作線方程式がy=0.75x+0.216の場合、操作還流比は（ B ） A、0.75 B、3 C、0.216 D、1.5
R/（R+1）=0.75 なのでR=3
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