<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
span{
font-size: 150px; /*让所有的span标签都变成150px*/
}
.G{
color:blue;
}
.o{
color: red;
}
.oo{
color: orange;
}
.l{
color: green;
}
</style>
</head>
<body>
<span class="G">G</span>
<span class="o">o</span>
<span class="oo">o</span>
<span class="G">g</span>
<span class="l">l</span>
<span class="o">e</span>
<!--类选择器可以选择一个或者多个标签-->
</html>
结果
