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<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>first demo</title> <script src="https://code.jquery.com/jquery-1.10.2.js"></script> </head> <body> <table> <tr><td>Row 1</td></tr> <tr><td>Row 2</td></tr> <tr><td>Row 3</td></tr> </table> <script> $("tr:first").css("color", "blue"); </script> </body> </html>
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