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Q 怎样才能知道四氢呋喃的完全无水？

Question time：6/12/2019 4:01:06 PM

Describe：怎样才能知道四氢呋喃的完全无水

A
1329219489@qq.com 2019-06-12 16:01
加入二苯甲酮做指示剂，在绝对无水的条件下显蓝色

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