The disc, digitally _____ in the studio, sounded fantastic at the party that night. [ ]

A. recorded

B. recording

C. to be recorded

D. having recorded

在下列各溶液中，离子一定能大量共存的是（  ）

A．强酸性溶液中：Na⁺_、、Mg³⁺、Cl^-、AlO₂^-

B．含有0.5 mol·L^-1 Al³⁺的溶液中：K⁺、Cl^-、CO₃^2-、NO^-₃

C．含有0.5 mol·L^-1 Ca²⁺的溶液中：Na⁺、K⁺、HCO₃^-、Cl^-

D．室温下，pH=13的溶液中：Na⁺、K³⁺、NO^-₃、HCO₃^-