外研版高中英语必修三《The world of science》PartⅡ PPT课件,共19页。
《The world of science》PartⅡ PPT课件包括语法精讲、即学即练等内容。
一、基本特征感悟
①Over time I have been changed quite a lot.
②Since the 1970s many new applications have been found for me.
③The important problem has been discusse