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http://topic.csdn.net/u/20120531/14/b2d2cfd9-93f0-4b84-86b2-ab1f70209fba.html?r=78733419

http://blog.csdn.net/neil89/article/details/7749152

http://my.oschina.net/curitis/blog/57908

http://my.oschina.net/curitis/blog/57904


http://blog.csdn.net/aomandeshangxiao/article/details/7286354