<div class="item w220">
<div class="form-label w100">
<label validate-error="form.importanceType">字段</label>
</div>
<select class="w120" ng-model="beans.importance" name="importanceType" validate
validate-required ng-options="foo.value as foo.name for foo in importanceTypes"
ng-change="importanceChange()">
</select>
</div>
代码如上:想要在改变事件里面获得下拉框选中的值 该怎么获取