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請(qǐng)問這句話什么意思呢? One half milliliter of uniform sample was collected and mixed with 20 mL NaI and starch solution. If the solution became blue, persulfate still remained; otherwise, rsulfate was completely decomposed. 這里面只說了體積,沒說各個(gè)物質(zhì)的濃度之類的,求解??謝謝! |


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