精选优质文档-倾情为你奉上读写训练：第一周阅读理解You frown (皱眉). You raise your eyebrows. You roll your eyes. What are you doing? You are making facial expressions.Facial expressions are one or more movements on a persons face. Scientists say that humans have 80 muscles (肌肉) in their faces. These muscles can make 7,000 different facial expressions.These expressions can be put into six categories (类别). They are happiness, sadness, anger, surprise, fear and disgust (厌恶). For example, when people think a ce
