A. out1ine-co1or 定义轮廓边框颜色 B. outline-sty1e 定义轮廓边框轮廓 C. out1ine-wi dth定义轮廓边框宽度 D. outline-offset定义轮廓边框位置
A. header B. footer C. nav D. article
A. MP4 B. WebM C. Ogg DAT
A. url B. range C. number D. date
A. transition-propert B. background-size C. transition-delay D. text-shadow
A. <!DOCTYPE html> B. <!DOCTYPE HTML5> C. <!DOCTYPE HTML5 PUBLIC “_//W3C//DTD HTML 5.0//EN” “http://www.w3.org/TR/html5/strict.dtd”> D. 以上都不是
A. <group> B. <header> C. <headings> D. <hgroup>
A. <media> B. <audio> C. <video> D. <movie>
A. animation B. transform C. transition D. box-shadow
A. box-shadow B. border-image C. border-style D. border-radius