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    【题目】关于尼日利亚经济的叙述，正确的是（）
    A.该国地处热带，其粮食产量和出口量在世界占有重要地位
    B.是非洲最大的石油生产国和出口国，石油行业是全国唯一的经济支柱
    C.该国平原面积广大，种植业为主，畜牧业几乎没有
    D.该国国民经济生产总值居非洲前列，是欧洲经济大国之一

    【答案】B
    【解析】尼日利亚是非洲最大的石油生产国和世界第六大石油出口国，也是石油输出国组织OPEC（欧佩克）成员国之一。石油工业是国民经济的支柱。尼原为农业国。自1970年代以来，石油出口逐渐成为该国最主要的经济来源。石油出口收入占出口总收入的98%，占国家总收入的83%。尼日利亚的是非洲第一大经济体。农业主要产区集中在北方地区。农业生产方式仍以小农经济为主，粮食不能自给，每年仍需大量进口。故选：B

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