css实现左边div固定宽度 右边div自适应撑满剩下的宽度

（1）使用float

<div class="use-float"><div></div><div></div></div>

.use-float>div:first-child{width:100px;float:left;}.use-float>div:last-child{overflow:hidden;}

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（2）使用table

<table class="use-table"><tr><td></td><td></td></tr> </table>

.use-table{border-collapse:collapse;width:100%;}.use-table>tbody>tr>td:first-child{width:100px;}

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（3）用div模拟table

<div class="use-mock-table"><div></div><div></div></div>

.use-mock-table{display:table;width:100%;}.use-mock-table>div{display:table-cell;}.use-mock-table>div:first-child{width:100px;}

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（4）使用flex

<div class="use-flex"><div></div><div></div></div>

.use-flex{display:flex;}.use-flex>div:first-child{flex:none;width:100px;}.use-flex>div:last-child{flex:1;}