求大神指教哪里有错误
div{ line-height:50px}
.left{width:200px; height:600px; background:#FF0;position:absolute;left:0}
.main{height:600px;background:#609;margin:0 300px 0 200px}
.right{height:600px; width:300px;background:#FCC;position:absolute;right:0}
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