同位语从句和定语从句的区别是：
关系代词在从句中成分的是定语从句（that做主语或宾语）,不做成分的是同位语从句（就是主谓宾齐全,that引导从句）.
The news that our players won the gold medals is reported~that引导同位语从句.从句中主谓宾齐全.
The man who is a police have done sth
who在从句中做主语.