[angular2] [ngModules]如何从其他模块调用组件？

我开始将我的应用程序重新编写为模块[ngModules].

我有一个小问题,我有两个不同的模块,但module1需要从其他模块调用一个指令(组件).

现在我这样做,但没有奏效……

AppModule(模块1)：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';

import { HttpModule }     from '@angular/http';

import { SimCardsModule } from './+sim-cards/sim-cards.module';

@NgModule({
  declarations: [
    AppComponent
  ],imports: [
    BrowserModule,CommonModule,FormsModule,HttpModule,SimCardsModule
  ],providers: [],entryComponents: [AppComponent],bootstrap: [AppComponent]
})
export class AppModule {

}

AppComponent：

import { Component } from '@angular/core';

declare let $: any;

@Component({
  selector: 'app-root',templateUrl: 'app.component.html',styleUrls: ['app.component.css']
})
export class AppComponent {

}

并在模板中

<sim-cards> loading </sim-cards>

现在我有sim-cards.module(模块2)：

import { NgModule,ApplicationRef } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';

import { HttpModule }     from '@angular/http';

import { SimCardsComponent } from './sim-cards.component';
import { SimCardsService } from './sim-cards.service';

@NgModule({
    declarations: [
        SimCardsComponent
    ],imports: [

        CommonModule,HttpModule
    ],providers: [SimCardsService],entryComponents: [SimCardsComponent],bootstrap: [SimCardsComponent]
})
export class SimCardsModule {

}

和sim-cards.component(模块2)：

import {Component,OnInit,ViewEncapsulation} from '@angular/core';
import {SimCardsService} from './sim-cards.service';
import {IfEmptySetDefaultPipe} from '../pipes/if-empty-set-default.pipe';
import {IsInternalSimCardPipe} from '../pipes/is-internal-sim-card.pipe';
import {ClientNumberSimCardPipe} from '../pipes/client-number-sim-card.pipe';
import {OperatorIdSimCardPipe} from '../pipes/operator-id-sim-card.pipe';

declare let $: any;

@Component({
    selector: 'sim-cards',templateUrl: 'sim-cards.component.html',styleUrls: ['sim-cards.component.scss'],encapsulation: ViewEncapsulation.None,pipes: [IfEmptySetDefaultPipe,IsInternalSimCardPipe,ClientNumberSimCardPipe,OperatorIdSimCardPipe]
})
export class SimCardsComponent implements OnInit {
...
}

如何以正确的方式做到这一点？我是否需要在appmodule中导入组件(sim卡)？在appcomponent？

或者我做错了什么？

在浏览器中我只得到字符串,加载…在控制台中没有错误.