Unit 19 Language
你会“口语”的同时你懂“手语”吗？请读下面这篇文章吧。
Sign Language
Sign has become a scientific hot button.Only in the past 20 years have specialists in language study realized that signed languages are unique－a speech of the hand.They offer a new way to explore how the brain generates and understands language，and throw new light on an old scientific debate：whether language，complete with grammar，is something that we are born with，or whether it is a learned behavior.The current interest in sign language has roots in the pioneering work of one rebel teacher at Gallaudet University in Washington，D.C.，world's only liberal arts university for deaf people.
