函数<img src="https://static.zxtiku.com/wangke/imgs/topic/77c31c3896eee91cd457a46121b9b1dc.png"/> 的间断点为<img src="https://static.zxtiku.com/wangke/imgs/topic/ff8a100807fadd397c5de4336e5fd42c.png"/> ,<img src="https://static.zxtiku.com/wangke/imgs/topic/0415c76563cdd572097ca85f6f6ce147.png"/> ,则此函数间断点的类型为( ).