单选题:某地区种植甲、乙两种粮食作物,今年单产水平为:甲作物400公斤/亩,乙作物250公斤/亩。假若明年的单产水平不变,只要( 题目分类:统计专业知识和实务 题目类型:单选题 查看权限:VIP 题目内容: 某地区种植甲、乙两种粮食作物,今年单产水平为:甲作物400公斤/亩,乙作物250公斤/亩。假若明年的单产水平不变,只要( ),也可以提高明年的粮食作物总平均亩产水平。 A.扩大粮食作物的总种植面积 B.按比例扩大甲、乙两种作物的种植面积 C.提高甲种作物种植面积的比重 D.提高乙种作物种植面积的比重 参考答案: 答案解析:
According to the passage, theorists throughout history have According to the passage, theorists throughout history have considered all of th 分类:统计专业知识和实务 题型:单选题 查看答案
It can be inferred from the passage that the author views th It can be inferred from the passage that the author views the transcendent justi 分类:统计专业知识和实务 题型:单选题 查看答案
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