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【Daily Question No. 144】December 15, 2017

2017-12-15View Original

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【Daily Question No. 144】December 15, 2017: The arc tube of a metal halide lamp is filled with mercury, ( ), and one or more metal halides. A. Air B. Oxygen C. Inert gases D. Hydrogen C. For management reasons, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have started) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have started) http://bbs.hcbbs.com/thread-1657794-1-1.html 2017 Daily Image Summary Thread https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 2017 LNG Version Daily Question List https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html

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