已知：2CO(g)+O₂(g)=2CO₂(g) H =-566kJ·mol^－1    N₂(g)+O₂(g)="2NO" (g)
H =+180kJ·mol^－1则2CO(g)+2NO(g)=N₂(g)+2CO₂(g)的H是

A．－386 kJ·mol^－^1	B．＋386 kJ·mol^－^1
C．－746 kJ·mol^－^1	D．＋746 kJ·mol^－^1