A: neither of the two components
B: the chrominance component
C: the luminance component
D: both of the twocomponents
举一反三
- The YUV color space is composed of a luminance signal Y and two color difference signals and chrominance signals U and V. The separation of Y, U and V is to realize the color signal received by black and white TV. ( )
- The YUV color space is composed of a luminance signal Y and two color difference signals and chrominance signals U and V. The separation of Y, U and V is to realize the color signal received by black and white TV. ( ) A: 正确 B: 错误
- The boundary condition of the electric field intensity of steady electric fields is A: the normal components are continuous. B: the tangential component are continuous. C: if there is no current at the interface, the tangential components are continuous. D: both the tangential and normal components are continuous.
- Friendship is both a source of pleasure and a component of good health.
- The DuPont method return on assets uses two component ratios. What are they?
内容
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当元素浮动导致它的父元素.bigbox塌陷时，可以使用（ ）清除浮动 A: .bigbox::after{ display: block; content: ""; clear: both; } B: .bigbox{clear: both; } C: .bigbox::before{ display: block; clear: both; } D: .bigbox{ display: block; content: "" }
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如果要清除浮动带来的影响，需要用到下面哪个css属性？ A: display:block B: display:inline C: float:both D: clear:both
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____ of the two students is on the playground. ____of them are in the language lab. A: Both… None B: Either… Both C: None… All D: Neither… Both
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________teacher has gone to America. ________of them are still in Shanghai. A: Both; Both B: Both; Neither C: Neither; Both D: Neither; neither
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以下选项中使用伪元素选择符让浮动元素的父元素高度自适应的是 A: 元素:after{content:"";display:block;clear:both} B: 元素:after{content:"";display:block;height:0;clear:both} C: 元素:after{content:"";display:block;clear:both;height:0;overflow:hidden;visibility:hidden} D: 元素:after{display:block;clear:both; height:0;overflow:hidden;visibility:hidden }