The main difference between the modem superfarm and diversified farms is______ What’s the main idea of the second paragraph?___

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问题 The main difference between the modem superfarm and diversified farms is______
What’s the main idea of the second paragraph?______

选项 A、Fossil energy was once very cheap
B、Farms in dry areas could get cheap water
C、Most American farmers used too much fertilizer and pesticide
D、Mainstream American agriculture used to be wasteful of energy, water and land

答案D

解析 第二段第一句指出,相比之下,美国主流农业到目前仍然不重视对能源、水和土地的使用。
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