题目

All students need to have good habits (好习惯)： When you have good study habits， you learn things quickly. You also remember them easily.Do you like to study in the living room? This is not a good place because it is usually too noisy. The telephone bell rings there； the TV is there， and sometimes it is a good place for your pet dog or cats to play and rest. You need to study in a quiet place， like your bedroom. A quiet place will help you only think about one thing， and you will learn better.Before you begin to study， do not forget to clean your desk. A good desk light is imp 常温下，将0.01 mol　CH3COONa和0.004 mol　HCl溶于水，配制成0.5 L混合溶液．判断： (1)溶液中共有________种微粒． (2)溶液中有两种微粒的物质的量之和一定等于0.01 mol，它们是________和________．