The cultivated land in the U.S. makes up______of the total land, and people who

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问题 The cultivated land in the U.S. makes up______of the total land, and people who are engaged in farming make up only 2.7% of the total population.

选项 A、21%
B、31%
C、0.41
D、0.51

答案 A

解析考查美国概况。美国自然资源丰富，发展农业有着得天独厚的条件。气候适宜、降雨充沛、土质肥沃，海拔500米以下的平原占国土面积的55％，有利于农业的机械化耕作和规模经营。美国的耕地面积约占国土总面积的21％。

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