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Methanol Daily Question 2018.11.26

2018-11-27View Original

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Among the standards for methanol products in our country, the methanol that meets the requirements of a potassium permanganate test within 50 minutes, with free acid levels ≤0.0015% and free base levels ≤0.0002% is (  ). A、 Top-grade product B、 First-class product C、 Second-class product D、 Qualified product A

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