Category: 19级
220609-元素化合物说课 氯及其化合物-08190404
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220526-概念原理-08190234
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220526-概念反应说课-08190325
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220421-复习课-08190227
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220414-化学复习课-08190214
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190609-钠及其化合物说课-26190429
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