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
Bias
Antarctica is the coldest place on Earth.
A. Truth
Bias
People from Shanghai are not as friendly as people from Luoyang.
A. Truth
Bias