<div ng-app="myApp" ng-controller="myCtrl">
<select ng-model="selectedName" ng-options="x for x in names"></select>
等价于：
<select>
<option ng-repeat="item in names">{{item}}</option>
</select>
<hr>
<!-- ng-repeat绑定的值为一个字符串，ng-options绑定的为一个对象 -->
<select ng-model="selectedSIte">
<option ng-repeat="item in sites" value="{{item.url}}">{{item.site}}</option>
</select>
<span>你选中的选址：{{selectedSIte}}</span>
<br><br>
<select ng-model="selectedSite" ng-options="x.site for x in sites"></select>
<span>你选中的选址：{{selectedSite}}</span>
<hr>
<!-- 因为对象数组没有key，angular默认使用数组的下标值作为key显示 -->
<select ng-model="AAAA" ng-options="x for (x, y) in sites"></select>
<span>你选择的值是: {{AAAA}}</span>
</div>

var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.names = ["Google", "Baidu", "Taobao"];
$scope.sites = [{
 site : "Google", url : "http://www.google.com"},
{site : "Baidu", url : "http://www.baidu.com"},
{site : "Taobao", url : "http://www.taobao.com"} ];
});