The meeting has lasted almost three hours. I suggest _____ it to an end. A. we bringing B. bring C. bringing D. us to bring 答案:C对于达到平衡状态的可逆反应N2(g)+3H2(g)?2NH3(g)正反应为放热反应下列叙述中正确的是( )
A、c(N2):c(H2):c(NH3)=1:3:2B、N2、H2 和NH3 浓度不再变化说明已达平衡C、增大压强不利于氨的合成D、N2与H2的物质的量之和是氨气的物质的量的2倍