题目内容

精馏操作时,若进料的组成、流量和热状况不变,增大回流比,则精馏段操作线方程的斜率____。

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板式塔塔板上气液两相接触状态有____、____和____三种。

Fan Bingbing was part of the movie X-Men: Days of Future Past.

A. Truth
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Antarctica is the coldest place on Earth.

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People from Shanghai are not as friendly as people from Luoyang.

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