If you're seeing this message, it means we're having trouble loading external resources on our website.
如果你被网页过滤器挡住,请确保域名*.kastatic.org 和 *.kasandbox.org 没有被阻止.
要登录及使用可汗学院的所有功能,请在您的浏览器中启用 JavaScript.
<!DOCTYPE html> <html lang="en"> <head> <title> 🐾 Pets R Us</title> <meta charset="utf-8"> <style> #header { background: url("dogs.jpg"); } </style> </head> <body> <div id="header"><h1>Pets R Us</div> <a href="mailto:pets@rus.com">Email us today!</a> </body> </html>
<title> 🐾 Pets R Us</title>
background: url("dogs.jpg");
<div id="header"><h1>Pets R Us</div>
<meta charset="utf-8">
<a href="mailto:pets@rus.com">Email us today!</a>