题型:选择题 下列对沉淀溶解平衡的描述正确的是[ ]A.反应开始时,溶液中各离子浓度相等B.沉淀溶解达到平衡时,沉淀的速率和溶解的速率相等C.沉淀溶解达到平衡时,溶液中溶质的离子浓度相等,且保持不变D.沉淀溶解达到平衡时,如果再加入难溶性的该沉淀物,将促进溶解 查看答案
题型:选择题 ---_________ ?---I’m not sure, but he might have been ill in bed.A.What do you think has happened to Tom B.What do you think Tom has happened C.Do you think what has happened to Tom D.Do you think what Tom has happened 查看答案