<input type="radio" name="t1" ng-model="demo" value="a">a <br>
  <input type="radio" name="t1" ng-model="demo" value="b">b
  <h2>{{demo}}</h2>

  <label ng-repeat="x in arrStr">
    <input type="radio" name="type1" ng-model="demo" value="{{x}}">
    {{x}}
  </label>
  {{demo}}

  <div ng-app="myApp" ng-controller="myCtrl">
    <label ng-repeat="x in arrStr">
      <input type="radio" name="demo" value="{{x}}" ng-model="$parent.demo">{{x}}
    </label>
    <h1>{{demo}}</h1>
  </div>

  [{
    "display":"开关",
    "data_range":["true","false"]
   },
   {
    "display":"工作模式",
    "data_range":["自动","手动"]
   }]

  <div ng-app="myApp" ng-controller="myCtrl">
    <div ng-repeat="x in str">
      <span>{{x.display}}:</span>
      <label ng-repeat="y in x.data_range">
        <input type="radio" name="{{x.display}}" ng-model="$parent.demo" value="{{y}}">{{y}}    
      </label>
      你的选择：{{demo}}
    </div>
  </div>

var app = angular.module("myApp", [])
    app.controller("myCtrl", function($scope, $log, $http){
      $scope.str = [
        {
          "display":"开关",
          "data_range":["true","false"]
        },
        {
          "display":"工作模式",
          "data_range":["自动","手动"]
        }
      ]
    })