Before agriculture _____, people made their living by hunting wild animals and their life

was _____ of nature. [ ]

A. came into being; at the mercy

B. was born; in the mercy

C. began to exist; in danger

D. appeared; with the mercy

枕大孔疝疝出的组织是（）

A.小脑蚓部

B.小脑扁桃体

C.颞叶钩回

D.额极

E.大脑扣带回