用途ng-option
：
<select ng-model="blah" ng-options="key as value for (key , value) in data"></select>
或使用ng-repeat
：
<select> <option ng-repeat="(key, value) in data" value="{{key}}">{{value}}</option></select>控制器中的数据：
$scope.data = { "key1": "val1", "key2": "val2", "key3": "val3", ...};
