CSS 选择器

#green {color:green;}

<p id="green">是绿色的。</p>

#table1 td {
    text-align: right;
    font-style: normal;
    color: blue;
    }

#table1 tr {
    color: #008000;
    font-style: italic;
    }

<table id="table1">
<td>ka</td><td>wa</td>       省略写法？
<tr><td>123</td><td>5566</td></tr>
</table>

<table>
<tr><td>55</td></tr>
<tr><td>66</td></tr>
</table>

table#table2 {
    border: 5px dotted #000;
    padding: 10px;
    color: red;
    }