14．_______on May 12,2008, Wenchuan county has taken on dynamic new look gradually two years since then.

A．Although it destroyed

B．Although destroyed

C．Although was destroyed

D．Although destroying

真空计用于测量发动机的（）。

A.负压

B.进气歧管负压

C.排气歧管负压

D.曲轴箱负压