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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: For questions from the same day, full feedback will be given if answered on the same day; answering the next day earns 5-8 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answer will be released automatically in two days. Multiple-choice question: Radiation is one of the three forms of heat transfer. It is ( ). A. Heat transfer within two substances. B. Transfer in the form of electromagnetic waves. C. Transfer from one part of a fluid to another part of that fluid. Answer: B. Petrochemical sector – “Creative Ideas for Energy Saving” campaign (the second phase is currently in progress): http://bbs.hcbbs.com/thread-1666758-1-1.html. “My Technical Improvements” in the coal chemical industry in 2017: http://bbs.hcbbs.com/thread-1786290-1-1.html. [Daily Question] Summary post on catalyst-based coking and reformation of petroleum products for 2017: http://bbs.hcbbs.com/thread-1811219-1-1.html
B. Transmitted in the form of electromagnetic waves