, , ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,1.1 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,1.2 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,1.3 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,J.2002(5).,.磬2000.,1,2,.2000423.,3,.磬2002.,4,M.磬2003.,5,J.,6,1.4 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,1.5 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,2.1 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,2.2 , ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC, ,2.3 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,2.4 ,03.,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,3.1 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,1,2,3,30%,3.2 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,2016,2017, , ,3.2 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,4.1 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,4.2 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,桢20,4.3 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,5.1 , ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,5.2 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,5.3 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC,5.4 ,BACKGROUND AND SIGNIFICANCE OF THE SELECTED TOPIC, , ,5.5 ,THANK YOU FOR WATCHING,