【題目】下列有關(guān)我國主要土地利用類型分布的敘述，正確的是（　�。�
A.我國的耕地主要分布在非季風(fēng)區(qū)
B.我國的林地主要分布在高原
C.我國的旱地主要分布在半干旱地區(qū)
D.我國的草地主要分布在400毫米年等降水量線以西

【答案】D
【解析】A、中國各類土地資源的空間分布不平衡，土地生產(chǎn)力區(qū)域差異明顯。耕地主要分布在東部季風(fēng)區(qū)的平原、盆地以及低緩丘陵地區(qū)，西部耕地較少，而且分布零散。故A不符合題意；
B、天然林地主要分布在東北、西南的邊遠(yuǎn)山區(qū)，東南部山區(qū)的林地多為人工林和次生林。西北和華北的大部分地區(qū)林地很少。故B不符合題意；
C、我國各地區(qū)土地資源的質(zhì)量差別很大。東部季風(fēng)區(qū)，雨熱同期，土壤肥沃，生產(chǎn)力高，集中了全國90%左右的耕地和林地。其中，北方半濕潤地區(qū)平原廣闊，耕地多，但熱量較低，降水較少，以旱地為主；南方濕潤地區(qū)多丘陵、山地，但熱量高，降水豐沛，以水田為主。故C不符合題意；
D、400毫米年等降水量線把我國大致劃分為東南與西北兩大半壁。東南半壁受季風(fēng)影響，雨熱同期。西北半壁地處內(nèi)陸，大多數(shù)地區(qū)嚴(yán)重缺水，水草肥美，適宜放牧，是我國重要的牧業(yè)地區(qū)。故D符合題意。
故選：D

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