小编Rus*_*ell的帖子

#myid      { background-color: pink; }
.main h1   { background-color: red; }
div h1     { background-color: blue; }
h1         { background-color: green; }

<!-- the background-color expected 
     to be pink for the following h1 -->
<div class="main" id="myid"> 
    <h1>This is paragraph one!</h1>
</div>
        
<!-- the background-color expected 
     to be brown for the following h1 -->
<div style="background-color:brown;" class="main" > 
    <h1>This is paragraph two!</h1>
</div>