根据短文内容填空。

   Jane White is an American girl. She is fifteen. She is a middle school student. Her father is Bill White and her mother is Joan White. Her brother, Bob, is a student, too. He is in a black coat and Jane is in a red sweater.

下列划线注音有误的一项是（     ）。

我国陆上疆界长达2万余千米，陆上领国有（    ）