求教实现将下面三张图片自适应浏览器宽度，就是把浏览器缩小后宽度依然铺满屏幕。_html/css_WEB-ITnose

<div class="threepic"><img  src="./images/fp_86.png" / alt="求教实现将下面三张图片自适应浏览器宽度，就是把浏览器缩小后宽度依然铺满屏幕。_html/css_WEB-ITnose" ><img  src="./images/fp_87.png" / alt="求教实现将下面三张图片自适应浏览器宽度，就是把浏览器缩小后宽度依然铺满屏幕。_html/css_WEB-ITnose" ><img  src="./images/fp_88.png" / alt="求教实现将下面三张图片自适应浏览器宽度，就是把浏览器缩小后宽度依然铺满屏幕。_html/css_WEB-ITnose" ></div>

.threepic{	position: relative;	overflow: hidden;	z-index: -1;	width: 1300px;    margin: auto;}.threepic img{    width: 421px;    float: left;    height: 440px;}