我想問下[O]呢個expression係指D乜??
係ethene 同 acidified potassium permanganate 既reaction條式裹面有..
收錄日期: 2021-04-13 16:52:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090930000051KK01551