Angular4_table中选中tr选中一行

Angular4_选中tr选中一行中的checkbox，并且高亮显示

<div class="row">
   <div class="col-md-12 options">
     <label class="checkbox-inline" *ngFor="let country of countries, let index=index">
       <input type="checkbox" [(ngModel)]="country.selected">{{index + 1}}
     </label>
   </div>
 </div>
 <div class="row" rtSelectionArea>
   <div class="col-md-12 item" *ngFor="let country of countries" [rtSelectable]="country" [(selected)]="country.selected">
     {{country.name}}
   </div>
 </div>