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>