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【Daily Question No. 147】May 27, 2017: Among petrochemical products, those with a flash point of 45°C or less belong to ( ). A. Flammable gases; B. Combustible gases; C. Flammable liquids; D. Combustible liquids. The reference answer can be seen after responding; points will be awarded once the key points are answered correctly. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) C grading criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers accompanied by detailed explanations; 15–20 Wealth points for correct answers with additional *insufficient* details. Please grade according to these criteria. Note: If there are editing records after answering, only those who participated will be given points. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters unrelated to the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html