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<!DOCTYPE html> <html> <body> <h1>input value 属性</h1> <p>value 属性指定输入字段的初始值：</p> <form action="/action_page.php"> <label for="fname">First name:</label><br> <input type="text" id="fname" name="fname" value="John"><br> <label for="lname">Last name:</label><br> <input type="text" id="lname" name="lname" value="Doe"><br><br> <input type="submit" value="提交"> </form> </body> </html>