078_标签有什么作用？

<form>
  <label for="male">Male</label>
  <input type="radio" name="sex" id="male" />
  <br />
  <label for="female">Female</label>
  <input type="radio" name="sex" id="female" />
</form>

 效果图如下：我们点击Male与Female提示字，就相当于点击了radio

Male
Female