自己录制的几段视频,请大家提宝贵意见啊。
http://v.youku.com/v_show/id_XNzI5NTUzMzYw.html
http://v.youku.com/v_show/id_XNzI5NTUzODA4.html
http://v.youku.com/v_show/id_XNzI4NDcyODA4.html
http://v.youku.com/v_show/id_XNzA5ODEzMDY0.html
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