Prueba si esto es lo que necesitas
Código HTML:
Ver original<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<table width="44%" border="1">
<td width="60%" class="parrafo"> Si
<input type="radio" name="radio" id="radio" value="radio" onClick="link1.style.display=''"> No
<input type="radio" name="radio" id="radio2" value="radio" onClick="link1.style.display='none'"></td> <tr id="link1" style="display:none"> <td class="parrafo"> </td> <td class="parrafo"><select name="select" id="select">