hhtml:
<select ng-change="change2()" ng-model="selected"
ng-options="item.id for item in datas">
</select>
angualrJs:
$http.get(‘url‘).then(function (res) {
$scope.datas= res.data;
$scope.selected= $scope.datas[0];
});
angularjs的ng-options时如何设置默认值(初始值)
原文：http://www.cnblogs.com/xyc211/p/7420115.html