喜欢的运动<br>

        <label>篮球</label>

        <input type="radio" value="1" name=“sport” checked="checked">

        <label>足球</label>

        <input type="radio" value="2" name=“sport” >

        <label>台球</label>

        <input type="radio" value="3" name="sport" >

???

<label>台球</label>

  <input type="radio" value="3" name="spaot" >

name=“sport”