#四六级写作六种最常见开头法 搜索结果
(1)主题句法：Theappealofadvertisingtobuyingmotivescanhavebothnegativeandpositiveeffects.Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportableputerinbusinesscl
