金属离子与EDTA所成配位化合物的稳定常数（）
A．邻苯氮菲指示液
B．淀粉指示液
C．偶氮紫指示液
D．溴麝香草酚蓝指示液
E．结晶紫指示液
参考答案：A
Without the music, the children would have not had so much fun.
A．wouldn't be having
B．wouldn't have been
C．wouldn't be
D．wouldn't have had
教育的整个过程要围绕着学生转。（ ）
