论文写手属于写手行业,论文是存在季节性差异的,所以论文写手只有在论文旺季的时候出现较多,论文写手往往有主业,或者是有兼职。 Examine and analyse the marketing and advertising combine needed for that offensive and defensive tactics which includes an in-depth advertising prepare 论文写作资料可分为第一手资料与第二手资料两类。前者也称为第一性资料或直接资料,是指作者亲自参与调查、研究或体察... https://socialfactories.com/story12838718/detailed-notes-on-%E8%AE%BA%E6%96%87%E4%BB%A3%E5%86%99