Background and terminology the Wright brothers: American brothers Wilbur,left,and Orville Wright invented the first practical airplane.Creative thinkerers from a young age,they built a printing press and worked on bicycles before turning their attention toward flight.Beginning with kites and then gliders,they achieved the first powered flight in 1903. 贵价爱，所質易大孝
Background and terminology Background and terminology the Wright brothers: the Wright brothers: American brothers Wilbur, American brothers Wilbur, left, and Orville Wright invented the first practical Orville Wright invented the first practical airplane. Creative thinkerers from a airplane. Creative thinkerers from a young age, they built a printing press and young age, they built a printing press and worked on bicycles before turning their worked on bicycles before turning their attention toward flight. Beginning with attention toward flight. Beginning with kites and then gliders, they achieved the kites and then gliders, they achieved the first powered flight in 1903. first powered flight in 1903
Background and terminology The Wright brothers 制尔香行質易大孝
Background and terminology Background and terminology The Wright brothers The Wright brothers
Background and terminology (insurance)premium the amount paid or payable,often in installments,for an insurance Policy 保险费 制价爱行蜀易大考
Background and terminology Background and terminology (insurance) premium (insurance) premium the amount paid or payable, often the amount paid or payable, often in installments, for an insurance in installments, for an insurance Policy 保险费
Background and terminology customs duty taxes payable on merchandise imported or exported from one country to another 关 税 tariff:tax levied upon goods as they cross national boundaries,usually by the government of the importing country. Usually assessed on imports,tariffs may apply to all foreign goods or only to goods produced outside the borders of a customs union。关税 制价爱行蜀易大考
Background and terminology Background and terminology customs duty customs duty taxes payable on merchandise imported or taxes payable on merchandise imported or exported from one country to another exported from one country to another 关 税 tariff：tax levied upon goods as they cross tax levied upon goods as they cross national boundaries, usually by the national boundaries, usually by the government of the importing country. government of the importing country. Usually assessed on imports, tariffs may Usually assessed on imports, tariffs may apply to all foreign goods or only to goods apply to all foreign goods or only to goods produced outside the borders of a produced outside the borders of a customs customs union. 关税
Background and terminology carrying capacity the maximum number of persons or things that a vehicle can carry 承运能力 制价爱行蜀易大考
Background and terminology Background and terminology carrying capacity carrying capacity the maximum number of persons the maximum number of persons or things that a vehicle can carry or things that a vehicle can carry 承运能力