03:34 | Apr 13th, 2020
第一季内容：《普通话水平测试专用教材》2013版（北京理工大学出版社）第二季内容：声价百倍机构出品（现已下架）第三季内容：《普通话水平测试专用教材》2018版（北京理工大学出版社）
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