![Thebikeisoneofthesimplestyetmostusefulinventionsinthewo...]( "Thebikeisoneofthesimplestyetmostusefulinventionsinthewo...")
- 問題詳情：Thebikeisoneofthesimplestyetmostusefulinventionsintheworld.Whatisthemosturprisingisthatitwasnotinvented1,althoughthegreatinventorLenardodaVincihaddrawnpicturesforbikes2forflyingmachinesandsomeotherthings.Thosethingswerenotproduced 3 longaft...
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