【題目】 我們的屯子?xùn)|面原是一片開闊的草甸子�！x屯子二十多里外的山林中,有一片我們生產(chǎn)隊的“飛地“,稱為“大荒地”。當年是十分肥沃的新開墾的山坡地,四周是成片的樹林�！@片山林是我們始終難以忘懷、必須朝拜的“圣地”�！鋵嵲缫严�,僅存于我們心中。當我們重新走上變得低矮的山岡,目及之處已全部是耕地,沒有一片樹林,沒有一株白樺。當年肥厚的黑土,因連年雨水沖刷流失,已變成貧瘠的砂石地,長著低矮的小麥……據(jù)此,完成下面小題。

【1】與華北平原相比,該地區(qū)發(fā)展農(nóng)業(yè)最為有利的自然條件是（ ）

A.光熱充足B.黑土面積廣大C.交通便利D.灌溉方便

【2】下列有關(guān)本屯農(nóng)業(yè)發(fā)展的敘述,不正確的是（ ）

A.以早作農(nóng)業(yè)為主B.農(nóng)作物一年二熟到三熟

C.主要農(nóng)作物有小麥、大豆、甜菜D.有“北大倉”之稱

【3】目前,影響該地區(qū)農(nóng)業(yè)可持續(xù)發(fā)展的因素除了水土流失外,還有（ ）

①濕地面積日益增多 ②生態(tài)環(huán)境惡化 ③土地肥力下降 ④環(huán)境污染

A.①②③B.①④③C.②③④D.①②④

【答案】

【1】B

【2】B

【3】C

【解析】

【1】

由題目可知，材料描述的是我國黑土廣布的東北平原，與華北平原相比，發(fā)展農(nóng)業(yè)最有利的條件是黑土面積廣大，土壤肥沃，故選B。

【2】

東北地區(qū)農(nóng)業(yè)以旱地農(nóng)業(yè)為主，故A正確。由于緯度高、熱量不足，農(nóng)作物熟制是一年一熟，故B錯誤。主要農(nóng)作物有小麥、大豆、甜菜，故C正確。糧食產(chǎn)量豐富，商品率高，有“北大倉”稱號，故D正確。故選B。

【3】

目前，該地區(qū)除了水土流失以外，還有濕地面積日益減少、生態(tài)環(huán)境惡化、土地肥力下降和環(huán)境污染等問題，濕地面積日益增多有利于農(nóng)業(yè)可持續(xù)發(fā)展，故選C。

本題考查東北地區(qū)農(nóng)業(yè)生產(chǎn)及生態(tài)環(huán)境的有關(guān)知識。

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