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配制Na2S2O3溶液,应当用新煮沸并冷却的纯水,其原因是

单选题
2021-09-01 23:18
A、使水中杂质都被破坏
B、除去NH3
C、除去CO2和O2 , 杀死细菌
D、以上都是
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正确答案
B

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