HTML5中视频的标记是什么？ A: <videos></videos> B: <video></video> C: <videos/> D: <video/>

下面选项中，关于video标记描述正确的是（ ）。 A: video是一个视频标记 B: video是一个音频标记 C: video标记中可以添加autoplay属性 D: 在<video>和</video>之间可以插入文字

无线端旺铺首页顶部导航由 3 个固定 Tab 和第 4 个可变的 Tab 构成。当前默认为用户在店铺后台设置的第五个 Tab；默认顺序为：（ ）。 A: Promotion> Feeds> Video > Member B: Feeds> Video > Member> Promotion C: Video> Member> Promotion> Feeds D: Member> Promotion> Feeds> Video

< video >标签中preload属性的作用是_______。

The non-covalent intermolecular forces described in this video behave differently. How are the forces ranked in terms of their energy? A: Van Der Waals > Ionic > Hydrogen bonds B: Ionic > Van Der Waals > Hydrogen bonds C: Ionic > Hydrogen bonds > Van Der Waals D: Hydrogen bonds > Ionic > Van Der Waals

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

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. ( )