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图A-12 英镑
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-13 德国马克
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-14 铜
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-15 原油
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-16 玉米
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-17 豆粕
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资料来源：Reprinted with permission.1988by Commodity Perspective，20South Wacker Drive，Suite 1820，Chicago，IL 60606
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图A-18 豆油
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