A:2SO2+O2=2SO3(g)△H<0
B:4NH3+5O2=4NO+6H2O(g)△H<0
C: 2NH3=N2+3H2△H>0
D:SO2+NO2=SO3(g)+NO△H<0
估算.
3.052÷0.7=____
下列文学常识有误的一项是( )