By saying that a country’s agricultural surpluses often "complicate" its economy, the author means ______. The governments impo

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问题 By saying that a country’s agricultural surpluses often "complicate" its economy, the author means ______.
The governments impose many kinds of control for farm prices and output because ______.

选项 A、farm crops are their main sources of export
B、the prices of different farm crops vary greatly
C、they are fully aware of the importance of them
D、farm prices and output are very unstable

答案D

解析 这是一道细节题。题干中的信号词为control,出自于文章第三段第三句话中。文章第三段指出;政府为价格以及农产量制定了大量的调节措施,主要是根据农民的要求制定的;农产品的价格往往比其他产品的价格波动得更频繁。这说明,原因是农产品的价格和产量更容易波动。D说“农产品的价格和产量非常不稳定”,这与文章的意思符合。文中没有提到A、B和C。
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