如何将多个值传递给angular 5 observable？

import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';

@Injectable()
export class DataService {
  private dataSubject = new Subject<any>();

  sendData(data: any) {
    this.dataSubject.next(data);
  }

  getData() {
    return this.dataSubject.asObservable();
  }
}

import { Component } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-sender',
  template: `
    <button (click)="sendValues()">Send Values</button>
  `
})
export class SenderComponent {
  constructor(private dataService: DataService) {}

  sendValues() {
    const values = ['value1', 'value2', 'value3'];
    this.dataService.sendData(values);
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-receiver',
  template: `
    <ul>
      <li *ngFor="let value of values">{{ value }}</li>
    </ul>
  `
})
export class ReceiverComponent implements OnInit {
  values: any[];

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getData().subscribe(data => {
      this.values = data;
    });
  }
}