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【题目】随着工业化、城市化的飞速发展,耕地不断被挤占,但2004年以来,我国粮食总量仍连续增长。据此完成下列小题。

【1】近年来,我国粮食总产量连续增长的主要原因是(  )

A.扩大了粮食播种面积

B.加大了农业科技投入

C.改进了农田水利设施

D.完善了粮食流通体系

【2】改革开放以来,下列粮食主要产区在全国商品粮食生产中的地位下降最为显著(  )

A.太湖平原B.洞庭湖平原

C.汉江平原 D.成都平原

【3】河南省和黑龙江省都是我国产粮大省。两省相比,黑龙江省粮食商品率高的主要原因是(  )

A.耕地面积广 B.生产规模大

C.机械化水平高 D.人口较少

【答案】

【1】B

【2】A

【3】D

【解析】

试题分析:

【1】依据题意:耕地面积缩小了,A错;粮食流通体系的完善并不能使粮食总量增长,D错;农田水利设施的改进只是粮食总产量增长的次要因素,最主要因素还得靠农业科技水平的投入,B对C错。

【2】改革开放以来,太湖平原城市化和工业化发展迅速,耕地大为下降,使商品粮食生产在全国的地的位迅速下降,A项符合题意。

【3】黑龙江省地广人稀,人均耕地面积大,是该省成为我国粮食商品率较高的主要因素,D符合题意。

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