Angular 2如何单独加载2个App根组件

// AppModule1.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent1 } from './app.component1';

@NgModule({
  imports: [BrowserModule],
  declarations: [AppComponent1],
  bootstrap: [AppComponent1]
})
export class AppModule1 { }

// AppModule2.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent2 } from './app.component2';

@NgModule({
  imports: [BrowserModule],
  declarations: [AppComponent2],
  bootstrap: [AppComponent2]
})
export class AppModule2 { }

// main.ts
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule1 } from './app.module1';
import { AppModule2 } from './app.module2';

// 加载AppModule1
platformBrowserDynamic().bootstrapModule(AppModule1)
  .catch(err => console.error(err));

// 加载AppModule2
platformBrowserDynamic().bootstrapModule(AppModule2)
  .catch(err => console.error(err));