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This instructional video keeps getting stuck and cannot be played. Why?

May I ask if other students are also stuck? I can't see the first and second quarters on my computer.

风云风云2461 days ago1030

reply all(1)I'll reply

  • 韦小宝

    韦小宝2018-02-26 14:36:40

    Check again to see if the card is stuck

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