题目

阅读理解 Memory, they say, is a matter of practiceand exercise. If you have the wish and really make a conscious(自觉的) effort, then you can quite easily improve yourability to remember things. But even if you are successful, there are timeswhen your memory seems to play tricks on you. Sometimes you remember things that reallydid not happen. One morning last week, for example, I got up and found that Ihad left the front door unlocked all night, yet I clearly remember locking itcarefully the night before. Memory tricks work the otherway as well. Once in a while you remember not doing so师徒二人共同加工一批零件，已知师傅加工了63个，徒弟比师傅少，徒弟、师傅共加工零件多少个？