A:36种
B:48种
C:72种
D:96种
下列关于化肥的说法正确的是()
- We failed in the singing competition.
- . Better times are waiting for you.
某温度下,体积和pH都相同的盐酸和氯化铵溶液加水稀释时的pH变化曲线如图所示,下列判断正确的是( )