多选题 : 为了给页面所有<H1>标题创建样式规则,指定将所有的<H1>标题显示为蓝色,字体显示为Arial.下列操作正确的是(选两项)()
(A)<STYLE TYPE="text/css">H1{color:blue}H1{font-family:Arial}>/STYLE>
(B)B<STYLE TYPE="text/css">H1{color:blue;fontface:Arial}>/STYLE>
(C)<STYLE TYPE="text/css">H1{color:blue;font-family:Arial}>/STYLE>
(D)<STYLE TYPE="text/css">H1{color:blue}H1{fontface:Arial}>/STYLE>
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