2019学年度人教版选修八Unit CloningPeriod1Warming Up & Reading课件(34张)
2019学年度人教版选修八Unit CloningPeriod1Warming Up & Reading课件(34张)第5页

6. Sadly the same ________ (任意的)fate affected other species, such as cloned mice. 7. But at last the determination and patience of the scientists paid off in 1996 with a ____________ (突 破)—the cloning of Dolly the sheep.

arbitrary

breakthrough