由于假性神经递质形成，它可竞争性取代正常神经递质而引起肝性脑病。
参考答案：对
Excuse me, where is the post office? [ ]
A. It's next to the cinema.
B. You can take the No. 15 bus.
C. I'll go with you.
D. The bus station is over there.
扣缴义务人每次代扣的税款，应当自代扣之日起（）日内缴入国库。
A.5
B.7
C.10
D.15
