3月13日：公益讲座、华杯赛试题讨论
table, td{font:100% Arial, Helvetica, sans-serif; }table{width:100%;border-collapse:collapse;margin:1em 0;}
th, td{text-align:left;padding:.5em;border:1px solid #fff;}
th{background:#328aa4 url(tr_back.gif) repeat-x;color:#fff;}
td{background:#e5f1f4;}
tr.even td{background:#e5f1f4;}
tr.odd td{background:#f8fbfc;}
th.over, tr.even th.over, tr.odd th.over{background:#4a98af;}
th.down, tr.even th.down, tr.odd th.down{background:#bce774;}
th.selected, tr.even th.selected, tr.odd th.selected{}
td.over, tr.even td.over, tr.odd td.over{background:#ecfbd4;}
td.down, tr.even td.down, tr.odd td.down{background:#bce774;color:#fff;}
td.selected, tr.even td.selected, tr.odd td.selected{background:#bce774;color:#555;}
td.empty, tr.odd td.empty, tr.even td.empty{background:#fff;}
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