多类选择器的运用_html/css_WEB-ITnose
html 复制 1 This is urgent warning. 2 Well,This is warning. What else? css 复制 1 .warning{font-weight:bold;}2 .urgent{fo...
html 复制 1 This is urgent warning. 2 Well,This is warning. What else? css 复制 1 .warning{font-weight:bold;}2 .urgent{fo...