If this kind of standalone sentence inside a "Correct the sentences" exercising contains "so", That is what has to be improved/corrected. This type of standalone sentence with "so" sounds incomplete. vivo手机主要的特点是外观时尚，音质也不错，因为明星代言的营销策略，主要还是在年轻群体中有很大市场，定价处于中端水平。值得一说的是，vivo旗下还有主打游戏性能的iQOO系列，市场反馈良好。 It eas... https://jonahg158emt2.bloggazza.com/profile