题目

在密闭容器中一定量混合气体发生反应:2A (g) + B (g))      xC(g),达到平衡时测得 A的浓度为 0.5 mol/L,在温度不变的条件下,将容器的容积扩大到原来的2倍, 再达平衡时测得A的浓度为 0.3 mol/L ,下列有关判断正确  ( )     A. x = 3                               B. 平衡向正反应方向移动     C. B的转化率降低                      D. C的体积分数增大 — He ought to have been warned of the danger.   — ______, but he just wouldn’t listen to me. A. So ought he       B. So he was        C. So was he         D. So he had
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