Isadvertisementreallynecessary?Billionsofdollarsarespen...
问题详情：Isadvertisementreallynecessary?Billionsofdollarsarespentoniteveryyear,soitmustbeimportant.Afterall,it’sabusyworld.Youhavetoadvertisetogetpeople’sattentiontosellproducts!Noteverycompanythinks...