题型:问答题 简答题 某容积可变的密闭容器中充入等物质的量的气体A和B,一定温度下发生反应:A(g)+B(g) 2C(g)+Q(Q>0),容器中物质浓度随时间变化的曲线如图所示。下列说法中正确的是A.30min时降低温度,40min时升高温度B.40min~54min之间反应速率v(正) < v(逆)C.设20min和30min时的平衡常数分别为K1和K2,则K1 >K2D.0~8minA的平均反应速率为0.64mol/(L·min) 查看答案
题型:问答题 简答题 — How many workers are there in your factory? — There are two _____. [ ]A. hundreds B. hundred C. hundred of D. hundreds of 查看答案