Angular 如何将下拉选择存储到变量中并在控制台上打印？

我想将下拉选择绑定到一个变量中，并在控制台中打印它。我该怎么做

HTML

<select class="form-control box" id="title" required>
    <option *ngIf="nationality_flag">{{nationality}}</option>
    <option *ngFor="let lists of default_nationality">{{lists}}</option>
</select>

{{国籍}
{{lists}}

<select [(ngModel)]="selected" (ngModelChange)="selectedChanged()" class="form-control box" id="title" required>

class MyComponent {
  selected:string;
  selectedChanged() {
    console.log(this.selected);
  }
}