当同一反应有两种写法时：
   (1)N₂(g)+3H₂(g)→2NH₃(g)    
   (2)    
   则和的关系是(    )
   A．    B．
   C．    D．

A.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9'
B.174.24.96:6088/Latex/latex.action?latex=XGZyYWN7MX17Mn1OXzIoZykrXGZyYWN7M317Mn1IXzIoZylcdG8gTkhfMyhnKQ%3D%3D'
C.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwyfV57XG9taW51cyB9'
D.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9'
E.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwyfV57XG9taW51cyB9'
F.G.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9PVxEZWx0YSBfckdfe20sMn1ee1xvbWludXMgfQ%3D%3D'
H.I.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9PXtcRGVsdGEgX3JHX3ttLDJ9Xntcb21pbnVzIH19%0D%0AXjI%3D'
J.K.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9PVxmcmFjezF9ezJ9XERlbHRhIF9yR197bSwyfV57%0D%0AXG9taW51cyB9'
L.M.174.24.96:6088/Latex/latex.action?latex=XERlbHRhIF9yR197bSwxfV57XG9taW51cyB9PTJcRGVsdGEgX3JHX3ttLDJ9Xntcb21pbnVzIH0%3D'