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一款跨平台的通讯工具。支持单人、多人参与。通过手机网络发送语音、图片、视频和文字。

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腾讯视频致力于打造中国领先的在线视频媒体平台，以丰富的内容、极致的观看体验、便捷的登录方式、多平台无缝应用体验以及快捷分享的产品特性，主要满足用户在线观看视频的需求

澎湃，澎湃新闻，澎湃新闻网，新闻与思想，澎湃是植根于中国上海的时政思想类互联网平台，以最活跃的原创新闻与最冷静的思想分析为两翼，是互联网技术创新与新闻价值传承的结合体，致力于问答式新闻与新闻追踪功能的实践。

中国大学MOOC_优质在线课程学习平台

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Sina Visitor System