— My daughter is a volunteer and often helps the disabled. — ______ . They’re really something. A. So are they B. So is my son C. So do they D. So it is with my son 答案:D12.如右图,在一定温度下,Ⅰ为恒压密闭容器,Ⅱ为恒容密闭容器。在Ⅰ、Ⅱ中分别加入2 mol A和2 mol B,起始时容器体积均为V L,发生如下反应并达到化学平衡状态: 2A十BxC(g),平衡时两容器中A、B、C的物质的量之比均为 1:3:6。下列说法一定正确的是 A.x的值为3 B.B物质可为固体或液体 C.Ⅰ、Ⅱ容器中从起始到平衡所需时间相同 D.平衡时,Ⅰ容器的体积小于V L