$result=mysqli->query($sql);这句话怎么会错呢？我都快疯了 高手帮忙解决一下吧

13 $sql="select * from team_login where id=12 and team_pass=111";
14 $result=mysqli->query($sql);
$mysqli=@new mysqli("localhost","root","","acmer");
$mysqli->set_charset("utf8");
这是我前面连接数据库的代码

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