【Daily Question No. 21】March 18, 2017 (The question is posted ahead of time because I need to leave early tomorrow to attend a marathon)

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The three equilibria in distillation operations are ( ), ( ), and ( ). Fill-in-the-blank question: Correct answer: Material balance, heat balance, phase balance. Reward rule for one question per day: 5 wealth points as a participation prize ； 10 Wealth for correct answer ； Petrochemical deep processing edition – the event to share pictures of chemical equipment has started! A vast amount of wealth, along with HaiChuan coins, is waiting for you to claim! http://bbs.hcbbs.com/thread-1760733-1-1.html Summary post for the Petrochemical Deep Processing section’s 【Daily Question】 – updated daily by the moderator. http://bbs.hcbbs.com/thread-1496481-1-1.html Summary post of weekly topics for the Petrochemical Deep Processing section~~~ Continuously being updated! http://bbs.hcbbs.com/thread-1751483-1-1.html Petrochemical Zone—New Ideas for Energy Saving: The “Creative Thinking” Campaign http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones await you; a thread for collecting chemical technology materials in the “Petrochemical Section” http://bbs.hcbbs.com/thread-1654603-1-1.html Numerous prizes waiting for you to claim