{ling-height:20px; height:20px; overflow: hidden}
隐藏无效的原因:是没有加宽度width
{width: 960px; ling-height:20px; height:20px; overflow: hidden}
{ling-height:20px; height:20px; overflow: hidden}
隐藏无效的原因:是没有加宽度width
{width: 960px; ling-height:20px; height:20px; overflow: hidden}