精选优质文档-倾情为你奉上四川大学2012考博英语真题及答案详解 阅读 1）Sign has become a scientific hot button. Only in the past 20 years have specialists in language study realized that signed languages are uniquea speech of the hand. They offer a new way to probe how the brain generates and understands language, and throw new light on an old scientific controversy: whether language, complete with grammar, is something that we are born With, or whether it is a learned behavior. The current interest in sign langua
