U1 Text Additional Video.wmv watch the video clip and answer the questions below. 1. According to the video clip, which city is the greenest one in Asia? _______ 2. According to the video clip, which city is the top one eco-friendly city in the world? ______ A. San Francisco B. Helsinki C. Curitiba D. Copenhagen /js/editor20150812/dialogs/attachment_new/fileTypeImages/icon_mv.gif

以下哪一个视频格式不属于video标签常用的视频格式? A: Ogg B: mp4 C: wmv D: webM

( )用于加入声音,( )用于加入视频。 A: <;audio>; <;video>; B: <;video>; <;audio>; C: <;audio>; <;audio>; D: <;video>; <;video>;

wmv是音频文件格式

Questions for video 21) What is the topic of this video clip?

Video encoder is also called video server, or DVS (Digital Video Server) for short. It is mainly used to encode and compress analog video signals and provide network transmission function. The difference with DVR products is that DVS focuses on the "video recording" function. ( )

关于video标签的描述，下面说法正确的是（）。 A: video是一个视频标签 B: video是一个音频标签 C: video标签中可以添加autoplay属性 D: 在<;video>;和<;/video>;之间可以插入文字

The function of the video distributor is one channel of video input and multiple channels of video output, with the functions of impedance matching and signal amplification. ( )

认真看以上视频，依次在下方列出视频中出现的所有时间状语从句： Video 1: ______________________________________________________________________________________ Video 2: ______________________________________________________________________________________ Video 3: ______________________________________________________________________________________ Video 4: ______________________________________________________________________________________

WAV、MP3、WMV都是音频文件格式。