问：在适当的位置添加表头和表主体元素。
index.html
<！DOCTYPE html>
< html >
< head > < meta charset = “ utf-8” > < title > HTML表格</ title > </ head > < body > < table > < thead > < tr > < th scope = “ col” >名称</ th > < th scope = “ col” >工作</日
>
</ tr > </ thead > < tr > < td > Nick </ td > < td >设计师</ td > </ tr > < tr > < td > Andrew </ td > < td >开发人员</ td > </ tr > < tr > < td >戴夫</吨>
< td >开发人员</ td >
</ tr > </ table > </ body > </ html >
答：您忘记添加表主体元素（<tbody>）
<！DOCTYPE html>
< html >
< head > < meta charset = “ utf-8” > < title > HTML表格</ title > </ head > < body > < table > < thead > < tr > < th scope = “ col” >名称</ th > < th scope = “ col” >工作</日
>
</ tr > </ thead > < tbody > < tr > < td > Nick </ td > < td > Designer </ td > </ tr > < tr > < td > Andrew </ td > < td >开发人员</ td > </ tr > < tr > <td >戴夫
</ td >
< td >开发人员</ td > </ tr > </ tbody > </ table > </ body > </ html >
