HTML CSS里面为什么不能用 *{margin:0; padding:0;}?答:form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td { border: 0 none; font-family: inherit; font-size: 100%; font-style: inherit; font-weight: inherit; margin: 0; outline: 0 none; padding: 0; }:focus { outline: 0 none; } table { border-collapse:...