49. What is the second paragraph mainly about?
(A) The cause of economic recession.
(B) Changes in currency rates and European powers.
(C) World War II and the drop in gold prices.
(D) The rise of a new currency exchange system.
私人筆記 (共 1 筆)
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題目翻譯及解析： 根據文章，第 2 段主...
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