The ups and downs due to the expansion and contraction of the economy constitute the （）。

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• Where is the title of the table？
• Which section（s） is（are） the body part of the whole research paper？
• 请判断对错。“提高现有耕地单位面积产量有潜力。”在以下A和B两个译文版本中，A版译文更符合英语表达习惯、意思更接近原文的译文。 A.Increasing the yield per unit area on the existing cultivated
• What is the main body of the text when it comes to the structure？
• You can use the order of importance to organize all the supporting details， and to make the most important point（cause or effect