【Daily Question】December 26, 2016 – Participation +2 Wealth； +3 to +10 wealth for correct answers
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To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched to foster an active atmosphere for technical exchanges while also providing financial rewards to users. 【Daily Question】 The regulators on high-pressure gas cylinders are painted in different colors; the color used for oxygen cylinders is ( ) ； The one used for hydrogen cylinders is ( ). Standards**: Sky blue, dark green. For your replies to these posts, you will earn +2 wealth points for participating in the quizzes; if you answer all questions correctly, you’ll get an additional +3 to +8 wealth points. If you provide a thorough analysis and explanation of the questions or give detailed calculation processes, you will receive extra wealth points as a reward. If your answers are correct and your analysis and explanations are accurate, your reply will be marked as the best reply (or the best assistance). Feel free to answer the questions.
Sky blue ----------------------------------Dark green,
The reducers on high-pressure gas cylinders are painted in different colors: those used for oxygen cylinders are (blue), while those used for hydrogen cylinders are (green).