为什么点击女会选择男 女id同样也是female
<form>
  <label for ="male">男</label>
  <input type="radio" name="gender" id="female" />
  <br />
  <label for="female">女</label>
  <input type="radio" name="gender" id="female" />
</form>
<form>
  <label for ="male">男</label>
  <input type="radio" name="gender" id="female" />
  <br />
  <label for="female">女</label>
  <input type="radio" name="gender" id="female" />
</form>
 
                            2019-12-06
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