题目

Keeping the memory in shape is important at any age,but it requires a bit more work as we grow. There are some simple activities that can improve your memory.【1】Awaken your senses.Use your senses to help your memory store(储存) needed information.【2】You can ask yourself like this: Is the sky a light blue or deep purple? The more involved(参与的) you can be in the information, the easier it is for your brain to store it.Use imagination and relation.Trying to remember names? Let’s say you meet a man named Frank Parker.【3】Tie the two together by picturing Frank dressed up in a 甲、乙、丙三种固体物质的溶解度曲线如图所示，下列说法正确的是（　　）A.降温可使丙物质的不饱和溶液变成饱和溶液B.t2℃时，等质量甲、乙、丙的饱和溶液中溶剂的质量：甲＞乙＞丙C.t2℃时，将15g甲物质加入到50g水中，再降温到t1℃，所得溶液溶质的质量分数不变D.分别将甲、乙、丙三种物质t2℃的饱和溶液降温到t1℃，所得溶液溶质的质量分数乙＞甲=丙