要将模拟视频信号转换为计算机可用的数字视频信号必须使用()。
A. 视频采集卡
B. 视频叠加卡
C. 视频解压卡
D. 电视编码卡
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Listen to the announcements and fill in the blanks.Ladies and gentlemen,We will be serving lunch soon. Please () your tray table in front of you. If you have ()diet requirement, please tell the cabin attendants. We also offer you a choice of tea, coffee, beer, () and other soft drinks. Hope you could enjoy these.Thank you!
在HTML表单中，使用input标签添加表单元素，通过哪个属性确定添加什么类型的元素。 （选择一项）
A. name
B. value
C. checked
D. type
