<p>                                                                                css属性：font-family,font-size,font-weight,font-style,color,text-decoration,text-align:justify;letter-spacing,word-spacing,

           <a href="http://www.mamicode.com/" target="_blank">                                                    css属性：color,text-decoration,

           <img src="http://www.mamicode.com/" alt=" " >                                                               css属性：padding,margin,vertical-align:text-bottom/text-top/middle;

           <ul><li> <ol><li>                                                                      css属性：float,display:block;background-position,list-style-type,list-style-image:url();

           <table><caption><thead><tbody><tfoot><col><tr><th><td>   css属性：border-collapse:collapse; table-layout:fixed; vertical-align:middle;

           <iframe src="http://www.mamicode.com/">

           <input type=" " name=" " value="http://www.mamicode.com/" align=" ">                           css属性：back-ground-color:transparent;

　　                     type:text,radio,checkbox,password,submit,reset,image,textarea,number,range,color,

                  <select name=" "><option value="http://www.mamicode.com/">

伪元素：p:first-letter{} div:first-child{} a:link{} a:visited{} a:hover{} a:focus{} a:active{}

属性选择器：img[width]{}

兄弟选择器：h1+p{} (选择所有紧跟在一个<h1>后的<p>元素)

派生选择器：div#greentea>blockquote p:first-line{}

图片替换：<span>Head Line</span>

                 span{display:none;}

                 body{background-image:url();

                           background-repeat:no-repeat;}

滑动门：<li><a href="http://www.mamicode.com/#"><strong>Home</strong></a></li>

              #menu ul li a{display:block;

                                   line-height:35px;

                                   color:#ddd;

                                   text-decoration:none;

                                   padding:0 0 0 14px;}

            #menu ul li a:hover{color:#fff;

                                           background:url() no-repeat right top;}

           #menu ul li a strong{display:block;

                                           padding:0 14px 0 0;}

            (IE中存在bug需增加#menu ul li a{float:left;})