精选优质文档-倾情为你奉上Today, I want to introduce the pyramidspirmid to you all !1.Near the modern city of Cairo lies the largest and most imposing concentration of pyramids in the world, 2.Here ,we just focus on some of them to simplify .And in this picture ,Built 4,000 years ago, the three great pyramids at Giza, in the Egyptian desert remain the most great buildings ever constructed. 3.And of course .Pyramids functioned as tombs for Pharaohs.4.The pyramids were built by Egyptian