2019学年度北师大版选修七Unit 20 Period 3Lesson 3 Scientific Breakthroughs课件(47张)
2019学年度北师大版选修七Unit 20 Period 3Lesson 3 Scientific Breakthroughs课件(47张)第4页

Ⅱ.短语自测 1._______________在某范围内变化 2._______________用……代替…… 3._______________计算出 4._______________被认为是…… 5._______________向某人求助

range from...to... replace...with... figure out be thought to be turn to sb.