css相关知识

h标签有align属性，left, right , center,  justify

<meta charset="UTF-8">

<img src="img/img.jpg" alt="未显示图片" title="提示文字" />

块级元素：display:block

行级元素: dispaly:  inline;

border: 1px red solid;

background-image:url(../grid.jpg);

backgroung-repeat: no-repeat;

background-position:

固定位置：background-position: 20px 40px;

background-color: red;