閲讀理解。Asweallknow,bikesaremainlymadeofsteel(鋼材).Butcanyo...
問題詳情：閲讀理解。Asweallknow,bikesaremainlymadeofsteel(鋼材).Butcanyouimaginethattheycanbemadeofbamboo?Doyouwanttoknowhowabamboobikeisproduced?Doyouwanttomakeyourownbikewithbamboo?YoucandoitattheBamb...