阅读理解。Asweallknow,bikesaremainlymadeofsteel(钢材).Butcanyo...
问题详情：阅读理解。Asweallknow,bikesaremainlymadeofsteel(钢材).Butcanyouimaginethattheycanbemadeofbamboo?Doyouwanttoknowhowabamboobikeisproduced?Doyouwanttomakeyourownbikewithbamboo?YoucandoitattheBamb...