小便频数，如米泔色，心神恍惚，健忘食少，治宜选用
A．金锁固精丸B．桑螵蛸散C．缩泉丸D．牡蛎散
参考答案：B
神经细胞膜电位由+30mV变为-70mV的过程称为（）
A.静息电位的形成
B.动作电位去极化
C.动作电位复极化
D.电紧张电位
E.后去极化
— Who invented the light bulb?
— It _____ by Thomas Edison. [ ]
A. invented
B. was inventing
C. was invented
