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Lecture and  Power Point file of this lecture on April 30, 2009

This is not the Final Version! The Lecture is updated daily for latest information and data. Please use for teaching purposes.

2009年4月30日讲稿以及讲稿PPT

这不是最终版本！讲稿每天更新以提供最新的信息和数据。请于教学时使用。