【简答题】(1)写出下列物质发生水解反应的离子方程式,并指出水溶液的酸碱性: ①NaHS_________________ ②NaHPO 4 _________________ ③CH 3 COONH 4 _________________ ④NaHSO 3 _________________ ⑤NaH 2 PO 4 _________________ ⑥CuSO 4 _________________ (...
【单选题】Which of these expressions can be used to contradict someone?
【单选题】下列关于酸的化学性质的表述错误的是()。
【单选题】Which of these processes can cause a local potential?
A.
changes in membrane permeability
B.
ligands binding to their receptors
C.
mechanical stimulation
D.
changes in the charge across the plasma membrane
【单选题】( ) 水溶性生物碱主要指的是:_________.
【多选题】Which of these people can suffer from a lot of stress?