这是一本很不错的介绍传感器电子书，里面介绍了很多中常见的传感器，希望大家好好学习。-This is a very good introduction to electronic sensors, which introduced a lot of common sensors, hope that we can learn from.

新扑克牌，游戏娱乐编程源码，很好的参考资料。-The new cards, game programming source code, a good reference.