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To increase the popularity of this section, a daily quiz activity has been launched. The purpose of this activity is: “Learn a little bit every day, and make significant progress over ten days.” I hope everyone will participate actively; by learning and making progress, they can also easily bring wealth home :) . Participation: Prize of 5 Wealth ； Correct answer: Reward of 10 wealth points ； Note: Questions from the same day will receive full feedback if answered on the same day; answers given the next day will earn 5-8 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/1.gif http://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be released automatically after two days. Multiple-choice question: If there is a certain \"gap\" between two adjacent fractions, it indicates that the separation of these two fractions is ( ) A. Good B. Poor C. Unable to determine. Answer: A. Petrochemical sector – Innovative ideas for energy savings: The \"Creative Thinking\" campaign (the second phase is currently in progress). http://bbs.hcbbs.com/thread-1666758-1-1.html. 2017: \"My Technical Upgrades\" in the coal chemical industry. http://bbs.hcbbs.com/thread-1786290-1-1.html. [Daily Question] Catalytic coking and reforming – Product blending, 2017 summary post. http://bbs.hcbbs.com/thread-1811219-1-1.html