题目内容

【题目】 下表为我国第二次全国土地调查中耕地的相关数据。依据国家政策规定，坡度在25度以上的坡耕地要退耕还林还牧。据表完成下面小题。

地区

耕地

（万公顷）

坡度25度以上坡耕地（万公顷）

有灌溉设施耕地

（万公顷）

全国

13538．5

549．6

6107．6

东部地区

2629．7

33．6

1812．5

中部地区

3071．5

75．6

1867．0

西部地区

5043．5

439．4

2004．3

东北地区

2793．8

1．0

423．8

【1】退耕还林任务最重的地区是（ ）

A.东部地区B.中部地区C.西部地区D.东北地区

【2】表中数据可以反映出我国（ ）

A.耕地资源总量丰富，人均耕地充足

B.地区间环境差异大，耕地分布不均

C.未利用土地多，后备耕地资源充足

【选项D】灌溉设施完善，农业摆脱洪涝影响

【答案】

【1】C

【2】B

【解析】

【1】

由表格数据可以看出，西部地区坡度在25度以上的耕地占了全国的绝大部分，这样的地区不适合发展种植业，容易发生水土流失，所以西部地区的退耕还林任务最重，故选C。

【2】

由表格数据可以看出，我国地区间环境差异大，耕地分布不均；不能看出人均耕地，后备耕地资源不足，灌溉设施不完善，故选B。

本题考查我国耕地有关知识。

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