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【題目】 我們的屯子東面原是一片開闊的草甸子。……離屯子二十多里外的山林中,有一片我們生產隊的“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”。…它其實早已消失,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……據此,完成下面小題。

1與華北平原相比,該地區發展農業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下列有關本屯農業發展的敘述,不正確的是( )

A.以早作農業為主B.農作物一年二熟到三熟

C.主要農作物有小麥、大豆、甜菜D.有“北大倉”之稱

3目前,影響該地區農業可持續發展的因素除了水土流失外,還有( )

①濕地面積日益增多 ②生態環境惡化 ③土地肥力下降 ④環境污染

A.①②③B.①④③C.②③④D.①②④

【答案】

1B

2B

3C

【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,發展農業最有利的條件是黑土面積廣大,土壤肥沃,故選B。

2

東北地區農業以旱地農業為主,故A正確。由于緯度高、熱量不足,農作物熟制是一年一熟,故B錯誤。主要農作物有小麥、大豆、甜菜,故C正確。糧食產量豐富,商品率高,有“北大倉”稱號,故D正確。故選B。

3

目前,該地區除了水土流失以外,還有濕地面積日益減少、生態環境惡化、土地肥力下降和環境污染等問題,濕地面積日益增多有利于農業可持續發展,故選C。

本題考查東北地區農業生產及生態環境的有關知識。

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