题目

在一密闭容器中，可逆反应aA（g）+bB（g）cC（g）达到平衡后，保持温度不变，将密闭容器的容积缩小为原来的1/2，当重新达到平衡后，C的浓度（mol・L－1）是原来的140%。下列说法中正确的是（  ）。A．平衡向正反应方向移动B．物质A的转化率降低了C．物质C的质量分数增加了D．a+b＞c 答案：B【试题分析】Every year _______ students attend the college entrance examination, and ______ them can be admitted into their ideal universities.A.a quantity; manyB.a quantity of; a good manyC.quantities of; many of D.quantities; a good many of