Someinventionsaresouseful,butseemsosimple,thatwewonder...
問題詳情： Someinventionsaresouseful,butseemsosimple,thatwewonderwhynoonethoughtofthemlongago.Post-itNotes,thepiecesofpaperthatyoucanfastenalmostanywhereandthenremovewithoutleavinganysignthattheywereth...