【td】
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
table {
}
table td {
empty-cells: hide;
border: 3px double;
padding: 3px;
}
</style>
</head>
<body>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>1</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td></td>
</tr>
</table>
</body>
</html>
