小明在帮助老师整理实验室时，发现实验台上有一瓶没用完的硫酸铜晶体，它应该把它放入的橱柜是 请选择DCBA'f5u9_,I+w9[-N2q6C8Y6H4R/L8r,[9[7q/],q
A．酸6H4R/L8r,[9[7q/],q
B．碱6H4R/L8r,[9[7q/],q
C．盐6H4R/L8r,[9[7q/],q
D．氧化物6H4R/L8r,[9[7q/],q