【单选题】在属性选择器中 ,对于属性class中值包含a1单词的添加样式:文字颜色为蓝色的代码是( )
B.
[class="a1"]{color:blue}
C.
[class~="a1"]{color:blue}
D.
[class$="a1"]{color:blue}
【判断题】A/D 指信号从数字量转换成模拟量。反之, D/A 指信号从模拟量转换成数字量。
【单选题】阅读以下代码,最后显示效果中有个英语单词的颜色是蓝色? p:first-child i { color:blue; } some text. some text. some text. some text.
【单选题】采用重型小试筒击实的每层击实次数是( )次。
【判断题】A/D 指信号从模拟量转换成数字量。反之, D/A 指信号从数字量转换成模拟量。
【单选题】Why is Harry shown as not being able to write the story of the boy?
A.
To emphasize his guilt of betraying the boy
B.
To summarize the regrets of his life
C.
To show that Harry has lost his creativity
D.
To show his lack of confidence in writing
【简答题】D/A指信号从数字量转换成___________。
【简答题】A/D指信号从___________转换成___________。反之,D/A指信号从数字量转换成模拟量。