血氨升高抑制丙酮酸氧化脱羧从而影响脑功能的机制是（）。

A.r－氨基丁酸减少

B.a－酮戊二酸减少

C.NADH减少

D.谷氨酰胺增多

E.乙酰胆碱减少

When the plane arrived, some of the detectives were waiting inside the main building ________others were waiting on the airfield.

A．during

B．where

C．which

D．while