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【Daily Question】Production, Storage, and Transportation – 10.9

2019-10-10View Original

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The AC version of Production, Storage and Transportation offers a question per day; answering it correctly earns 3 units of wealth; Effective participation grants 1 unit of wealth ; A special bonus will be given to the first person who provides a correct answer. Multiple-choice question: The working distance between oxygen cylinders and acetylene cylinders should not be less than ( ) meters. A 4 ; B 5 ; C 7 ; D 10. B

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