```html

苹果

香蕉

```

四、应用场景

- 表单中选择性别、城市、国家等信息

- 多选商品类别或标签

- 动态加载数据后更新下拉选项

- 实现级联选择（如省份-城市）

五、注意事项

- 如果没有设置 `name` 属性，表单提交时该字段不会被发送。

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