I am considering changing to a more interesting job, as the present job, which requires a lot of _______, nearly bores me to death.

A．repetition

B．instruction

C．impression

D．appreciation

马霉玉米中毒引起的大脑软化属于（）

A.凝固性坏死

B.液化性坏死

C.干酪样坏死

D.脂肪坏死

E.湿性坏疽