The mountain village was      by the snow for more than a month, so food was badly needed. [ ]

A. died out      

B. stuck out    

C. cut off        

D. gone for  

冰川表面的气温与同海拔自由大气相比，始终处于稳定的低温状态。下左图是我国某山地冰川分布剖面图，下右图是某日观测站A处上空温度垂直分布的日变化图（单位°C）。从热力环流角度考虑，完成下列问题。

一天中①地风力最强的是（）

A.7时-9时

B.12时-14时

C.15时-17时

D.4时-6时