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| A．Cu2+ +2OH-=Cu(OH)2 CuCO3+2NaOH=Cu(OH)2+Na2CO3 |
| B．CO32-+ 2H+= CO2+ H2O BaCO3+ 2HCl =BaCl2+ CO2+ H2O |
| C．Ca2++ CO32-= CaCO3 Ca(NO3)2+NaCO3= CaCO3+NaNO3 |
| D．H++OH-= H2O 2KOH+H2SO4= K2SO4+2H2O |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
