Angularjs材质-同步多个选择框

我需要让他们都同步起来,这样当用户选择选项1,在wichever框,所有其他框将在选项1。

  $scope.French_Options = ["Un", "Deux", "Trois"];
  $scope.Bilingual_Options = ["Un/One", "Deux/Two", "Trois/Three"];
  $scope.English_Options = ["One", "Two", "Three"];

<md-input-container>
    <label>French</label>
    <md-select ng-model="selection.french" ng-change="baseValueChange()" >
        <md-option ng-repeat="option in French_Options" ng-value="option "> {{état_fr}} </md-option>
    </md-select>
</md-input-container>                              

<md-input-container>
    <label>Bilingual/ Status</label>
    <md-select ng-model="selection.bilingual" ng-change="Notifications.('Bilingue', $index)" >
        <md-option ng-repeat="option in Bilingual_Options" ng-value="option "> {{état_bilingue}} </md-option>
    </md-select>
</md-input-container>                                                                         

<md-input-container style="margin-top: 5px; margin-bottom: 5px;" flex="25">
    <label>English</label>
    <md-select ng-model="selection.english" ng-change="baseValueChange()>
        <md-option ng-repeat="option in English_options" ng-value="option "> {{état_en}} </md-option>
    </md-select>
</md-input-container>   

有人知道如何做到这一点吗?