下列说法正确的是[ ]

A．碳酸氢钠可用于治疗胃酸过多

B．用酚酞试液区分氢氧化钾和氢氧化钠溶液

C．浓硫酸溶于水时吸收热量

D．不能用食盐作原料制氢氧化钠

G.Lozanov was the founder of ______.

A. the Community Language Learning
B. the Direct Method
C. Suggestopaedia



D. the Natural Approach