“政启开元,治宏贞观”称赞的帝王是( )
A:唐太宗
B:唐高祖
C:唐玄宗
D:武则天
①____ Na2S2O3+____HCl→____ NaCl+____S+____SO2↑+
____H2O
②____ Zn+____H++____NO3﹣→____ Zn2++____NH4++____H2O.