有关肾性脑病发病机制假说哪项不对（）

A.毒素积蓄

B.脑代谢障碍

C.电解质代谢障碍

D.神经递质代谢障碍

E.慢性应激

Large amounts of food imports placed a great strain (沉重负担) on the country's gold .

A．storage

B．deposit

C．reservation

D．reserve