题目

相同温度、相同浓度下的八种溶液，其pH由小到大的顺序如图所示，图中①②③④⑤代表的物质可能分别为() A．NH4Cl (NH4)2SO4 CH3COONa NaHCO3 NaOH B．(NH4)2SO4 NH4Cl CH3COONa NaHCO3 NaOH C．(NH4)2SO4 NH4Cl NaOH CH3COONa NaHCO3 D．CH3COOH NH4Cl (NH4)2SO4 NaHCO3 NaOH 答案：BThere is a growing________for people to work at home instead of in offices.     [     ]A. temptation                    B. tendency    C. tradition                       D. fashion