复数的几种表示方法
http://wenku.baidu.com/link?url=FGIWeHzmhiMyEUy9zFVPN_TBcjHgCNR-3k_qNYywgOLP7yIhVpvedCF43ac5U5Tz3cKk5yn4NGRm65m_knIOEEzHIWdkdIcGMwzrYWblv9m
http://wenku.baidu.com/link?url=e1KxvRXPMKJ2k6UygvbQcdylfIAxcYf6hMWGNEFPDWJcBuSSa4d3U4-Uy9SR_xlakJl7AttjdRQpEq4xJNsX8mLD8Oix68kLIPCiaV0X0yW
http://www.docin.com/p-624697155.html