sql语句代码是这个

sql="INSERT INTO "+table+" (";
        for(int i=0;i<num;i++){
            sql    +="'"+Field[i]+"'";
            if(i!=num-1) sql+=",";
        }
        sql+=") VALUES (";
        for(int i=0;i<num;i++){
            sql    +="'"+Cont[i]+"'";
            if(i!=num-1) sql+=",";
        }
        sql+=");";

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''TeachID','WorkName','WorkLoad')VALUES('000002','课程设计','120')' at line 1

请问这里是什么错误，看不出来