【Weekly Question】Participation from 9.4~9.10, 2017 +2 wealth； +3 to +10 wealth for correct answers

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To increase the popularity of the chemical analysis section, a \"Question of the Week\" campaign has been launched to foster an active atmosphere for technical exchanges while offering financial rewards to users. 【Weekly Question】Which of the following is the main interference factor in atomic absorption spectroscopy analysis? A. Chemical interference B. Physical interference C. Spectral interference D. Flame interference. Answer: A. Please reply with your answer; participating in the quiz earns you +2 wealth points. Those who get all answers correct will receive an additional +3 to +8 wealth points. Extra rewards will be given for those who provide thorough analyses and explanations of the questions or answers, or who include detailed calculation processes. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions.