名词解释:5×4’=20分 1. International trade is the exchange of goods and services across national borders or territories. 2. General trade system is on the base of national boundary. The general trade system is in use when the statistical territory of a country coincides with its economic territory. 3. The Leontief Paradox refers to the conflict between the conclusion of H-O theory and actual certification. It was introduced by Wassily Leontief who was the pioneer of input-output economics in his Input-output Economics published in 1966. Leontief researched the labor and capital content of the USA imports and exports in 1947 and 1951. 4. GSP is a system currency in place where a large number of developed countries permit duty-free entry of a selected list of products if those products are imported from particular developing countries. This duty-free entry exists even though a positive tariff is levied if those e in from developed countries, or other, richer developing countries. 5. Import Quota refers to the restriction imposed on import goods in terms of quantity and total value in a certain period. 6. “Voluntary” export restraints In a certain period (usually 3 to 5 years) the exporters take export quotas of some products voluntarily under the pressure or demand of importers. 7. Bill of exchange is an unconditional order in writing signed by the person (drawer), and address