制作一个用户注册表单

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <h3>用户注册界面</h3>
    <form action="1.php" method="GET"></form>
    <div>
      <label for="name">账号:</label>
      <input type="text" name="name" id="name" autofocus required />
    </div>
    <div>
      <label>密码:</label>
      <input type="password" name="paw" id="paw" required />
    </div>
    <div>
      <label for="fruit">水果:</label>
      <input type="radio" name="" id="fruit" /><label>葡萄</label>
      <input type="radio" name="" id="" /><label>香蕉</label>
      <input type="radio" name="" id="" /><label>菠萝</label>
    </div>
    <div>
      <label for="fru">水果:</label>
      <input type="checkbox" name="" id="" /><label>葡萄</label>
      <input type="checkbox" name="" id="" /><label>香蕉</label>
      <input type="checkbox" name="" id="fru" /><label>菠萝</label>
    </div>
    <div>
      <select name="" id="">
        <option value="1">葡萄</option>
        <option value="2" selected>香蕉</option>
        <option value="3">菠萝</option>
      </select>
    </div>
    <button>提交</button>
  </body>
</html>

基本选择器

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=u, initial-scale=1.0" />
    <title>Document</title>
    <style>
      ol {
        background-color: rebeccapurple;
      }
      li#apple {
        background-color: rosybrown;
      }
      li.banana {
        background-color: black;
      }
      li[id="pt"] {
        background-color: chartreuse;
      }
    </style>
  </head>
  <body>
    <ol>
      <li id="apple">苹果</li>
      <li class="banana">香蕉</li>
      <li id="pt">葡萄</li>
      <li>菠菜</li>
      <li>西瓜</li>
    </ol>
  </body>
</html>

上下文选择器

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=u, initial-scale=1.0" />
    <title>Document</title>
    <style>
      ol li {
        background-color: chartreuse;
      }
      body > ol > li {
        background-color: chocolate;
      }
      #xg + li {
        background-color: cornflowerblue;
      }
      #bc ~ li {
        background-color: cyan;
      }
    </style>
  </head>
  <body>
    <ol>
      <li>苹果</li>
      <li id="xg">香蕉</li>
      <li>葡萄</li>
      <ol>
        <li id="bc">菠菜</li>
        <li>西瓜</li>
        <li>菠菜</li>
      </ol>
      <li>菠菜</li>
      <li>西瓜</li>
    </ol>
  </body>
</html>

批改老师：

天蓬老师

批改状态：合格

老师批语：下次记得配个图

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