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A、CaCO3(s) →CaO(s)+CO2(g)
B、N2(g)+3H2(g) →2NH3(g)
C、C(s)+O2(g) →CO2(g)
D、2H2(g)+O2(g) →2H2O(l)
Cu-Zn原电池的电池反应为Zn(s)+CuSO4(aq)═ZnSO4(aq)+Cu(s),电池符号为______。
A.(-)Zn(s)|CuSO4(c1)||ZnSO4(c2)|Cu(s)()
B.(-)ZnSO4(c1)|Zn(s)|"Cu(s)|CuSO4(c2)()
C.(-)Cu(s)||CuSO4(c1)|ZnSO4(c2)|Zn(s)()
D.(-)Zn(s)IZnSO4(c1)||CuSO4(c2)|Cu(s)()
A、(1)能自发(2)不能
B、(1)和 (2 ) 都能自发
C、(1)不能(2) 能自发
D、(1)和 (2) 都不能自发
A、rules
B、rulers
C、roles
D、roles
A、Settlers
B、Mayflower
C、New Hope
D、Lancaster
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