A:H2SO4 NaCl Na2CO3 CaCl2
B:HCl NaOH CuSO4 MgSO4
C:Na2CO3 K2SO4 BaCl2 HCl
D:NaNO3 HCl CaCl2 KOH
____.
365000____375000 477万____ 478000 30050____3万
207548000____2亿 2980500000____289030000 465040 ____465039
782600____783500 151900000____9970000 56万____ 559950
-Good idea! That sounds _________.