有“绿色水库”之称的生态系统是（  ）

用所给词的适当形式填空

任务型阅读
    Chinese writer Mo Yan won the 2012 Nobel Prize in Literature(诺贝尔文学奖)．He is the first Chinese to win the prize．
    Mo Yan was born into a farmer's family in Shandong in 1955．He left school to work at the age of twelve，first on the farm，later in a factory．In 1 976 he joined the PLA and during this time he began to study writing．His first short story was published(出版)in 1981．He has written many famous books about his childhood and his home town．Many of his books were translated into English，French and many other languages．
    Mo Yan's winning of the Nobel Prize in Literature，widely regarded as(被认为)a great encouragement for China's literature，is bringing more confidence to the nation's young authors．
根据短文内容，回答下列问题。

如果∠α与∠β是邻补角，且∠α＞∠β，那么∠β的余角是（   ）

如果|a+2|+（b﹣1）²=0，则（a+b）²⁰¹⁵的值是（　　）