尴尬，刚才写错成单选框了- -

<from>

<label>你对什么运动感兴趣：</label><br />

<label for="run">慢跑</label>

<input type="checkbox" name="checkbox1" value="慢跑" id="run"><br />

<label for="cimb">登山</label>

<input type="checkbox" name="checkbox2" value="登山" id="cimb"><br />

<label for="baketball">篮球</label>

<input type="checkbox" name="checkbox3" value="篮球" id="baketball">

</from>

<from>

<label>你对什么运动感兴趣：</label><br />

<label for="run">慢跑</label>

<input type="radio" name="sport" value="慢跑" id="run"><br />

<label for="cimb">登山</label>

<input type="radio name="sport" value="登山" id="cimb"><br />

<label for="baketball">篮球</label>

<input type="radio name="sport" value="篮球" id="baketball">

</from>

 <form>

  <label>你对什么运动感兴趣：</label><br />

  <label for="1">慢跑</label>

  <input type=checkbox name="x1" id="1"><br />

  <label for="2">登山</label>

  <input type="checkbox" name="x2" id="2"><br />

  <label for="3">篮球</label>

  <input type=checkbox name="x3" id="3"><br />

  <input type="reset" value="重置"  />

</form>