We were strongly recommended that we _____ in Malaysia.

A．didn’t travel

B．wouldn’t travel

C．hadn’t travelled

D．not travel

常用于记录海马、杏仁核、钩回等结构电活动的电极是（）。

A.蝶骨电极

B.鼻咽电极

C.头皮电极

D.硬膜下电极

E.深部电极