tr td 在 table里 td 在 tr 里
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表格</title>
</head>
<body>
<table border="1"><!--两行三列-->
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>1</td>
</tr>
<tr>
<td>jiji</td>
<td>222</td>
<td>3</td>
<td>1</td>
</tr>
<tr>
<td>4</td>
<td>4</td>
<td>4</td>
<td>1</td>
</tr>
</table>
</body>
</html>