英语演讲我眼中最重要的发明自行车省公共课一等奖全国赛课获奖课件.pptx

1361-1361-李文杰李文杰第1页The definition of bicycleA bicycle,also known as a bike,pushbike or cycle,is a human-powered,pedal-driven(脚踏驱动)，single-track vehicle,having two wheels attached to a frame,one behind the other.,第2页History第3页now通勤（普通）自行车通勤（普通）自行车 公路自行车（公路自行车（Road bicycleRoad bicycle）场地自行车（场地自行车（Track bicycleTrack bicycle）山地自行车（山地自行车（Mountain bikeMountain bike）速降自行车（速降自行车（DownHill bikeDownHill bike）斜躺自行车（斜躺自行车（RecumbentRecumbent）旅行自行车（旅行自行车（Touring bicycleTouring bicycle）越野公路车（越野公路车（Cross-country cyclingCross-country cycling）折叠车（折叠车（Folding bicycleFolding bicycle）电动自行车（电动自行车（Motorized bicycleMotorized bicycle）小轮车（小轮车（Cycling BMXCycling BMX）轴传动自行车轴传动自行车 皮带传动自行车皮带传动自行车第4页Social and historical aspectsIn In daily daily lifelife第5页Social and historical aspectsPoverty Poverty alleviationalleviation第6页Social and historical aspectsFemale Female emancipationemancipation第7页Social and historical aspectsEconomicEconomic implications implications第8页Not just a bikeThank you第9页