电子书与纸质书的对比-课件（ppt·精·选）.ppt

salesgirlsE-bookPaper book?Download E-books easily?It is like a personal library?The knowledge that e-book has is limited because of the -bookPaper book?Save much time and energy?Spend time running to bookstores or libraries?It’s easy to lose information.?It’s hard to lose -bookPaper bookE-booksPaper books Storing information in the silicon chipsspace-consumingE-booksPaper books Requiring special devices or puters bulky heavyE-booksPaper books?Download e-books is cheap?buy a PC work are very expensive?Costing some money ifyou buy books?Doing harm to eyes and skins?Causing eyestrain?They don't normally cause significant eye-strain. ?They won’t cause any harm to your -booksPaper books?Power-wasting?Not being environmentally friendly?Cutting down trees