To school, meet a senior, he is learning the power supply, and his understanding of the power supply is also very, remember once the school power suppl appeared problem, he also found in a timely manner, and he used his usual at that time some knowledge learned in class to power suppl to repaired, said they have the time will be at home to do some research, it seems their research is also had some effect, at the time of key, also can come in handy, dry also is really good, then he was in the class, the teacher may well ask him some questions, let him can effectively put the thing to remember, sometimes also can come in handy!