反应N2+3H22NH3刚开始时，N2的浓度为3 mol/L，H2的浓度为5 mol/L，3 min后测

反应N₂+3H₂2NH₃刚开始时，N₂的浓度为3 mol/L，H₂的浓度为5 mol/L，3 min后测得NH₃浓度为0.6 mol/L，则此时间内，下列反应速率表示正确的是

A．v(NH₃)=0.2 mol/（L·s） B．v(N₂)=1.0 mol/（L·min）

C．v(H₂)=1.67 mol/（L·min） D．v(H₂)=0.3 mol/（L·min）

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