_____ in the mountains for three days, the young man was finally saved by the local police. [ ]

A. Having lost

B. Lost

C. Being lost

D. Losing

供应大脑外侧面血液的血管是（）

A.大脑中动脉 

B.大脑后动脉 

C.大脑前动脉 

D.椎动脉 

E.基底动脉