<{p}>以下代码<{/p}><{p}>var vm = new Vue({<{br/}> el: '#app',<{br/}> data: {<{br/}> obj: {}<{br/}> }<{br/}> })<{br/}> Vue.set(vm.obj, 'b', '我是Vue.set添加的响应式属性obj.b');<{br/}> console.log(vm.$data.obj.b);执行后的结果是__________。<{br/}><{/p}>