教育时评：“减负新政”后，家长们准备好了吗
百度 由这些事件引出的愤怒，俄罗斯人最后都转化成了对普京连任总统的支持。
Media community: Audio and video requests · Featured media (candidates) · Media help · Media of the Day · Timed Text · Video info · Video2commons–Upload · Video cut tool
Help pages for playing media files on Commons
To play sound and video files
Wikimedia Commons uses open formats like MP3, Ogg Vorbis and WAV for sound files and WebM and Ogg Theora for video files.
These file types are preferred to other, more common file types, because they are not encumbered with patents. You can learn in the following pages which software and which codecs you need to play our media files.
The latest versions of all major desktop web browsers and Android are able to play uploaded sound files and videos without any additional codecs or software. Mobile devices like iOS use additional software that makes playback on those devices less efficient.
If you are looking for help creating or editing media files, see Commons:Software and Commons:Video/Commons:Audio.Choose your operating system:
.svg)
