【Daily Question No. 001】2017.07.08

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This post was last edited by liuquan1100 on 2017-7-9 19:12. [Daily Question No. 001] 2017.07.08. In a broad sense, natural gas refers to all gases that exist naturally in the environment, including those formed through various natural processes in the atmosphere, hydrosphere, and lithosphere. A. Atmosphere B. Biosphere C. Hydrosphere D. Lithosphere. The reference answers will be visible after answering; scoring is possible by identifying the key points. Summary post of Q&A questions from 2017 (updates have begun): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions from 2017 (updates have begun): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions from 2016 (updates completed): http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical sector – “Creative Ideas for Energy Saving” campaign (the second phase is in full swing): http://bbs.hcbbs.com/thread-1666758-1-1.html “My Technical Upgrades” in the field of coal chemistry for 2017: http://bbs.hcbbs.com/thread-1786290-1-1.html Note: In order to boost activity in the LNG section, starting from July 8, 2017, the serial number for daily questions will be 001. Interested moderators and technicians can contact me; if no suitable candidate is found, I will take on the task of updating them temporarily. liuquan1100