关注微信公众号查券更方便
【3-4周达】The Geometer's Sketchpad, Pythagoras Plugged Proofs and Problems [9781604402810]
![【3-4周达】The Geometer's Sketchpad, Pythagoras Plugged Proofs and Problems [9781604402810]](/Public/skin2/static/tqkpc/images/grey.gif)