精选优质文档-倾情为你奉上初一阅读、完形、选词8Bats are the only flying mammals in the world. They cant see very well. It was long believed, and still is in many places, that all bats are blind. “Blind as a bat” is often heard. Yet they have no trouble flying on the darkest nights and finding their way around very well. How can bats fly and see at night? They fly by radar! The bats radar system works the same way as the one that ships and planes use. As a bat flies through the air, he makes a sound th
