In most South American countries rail transport is plagued by operational problems as well as by obsolete equipment.

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问题 In most South American countries rail transport is plagued by operational problems as well as by obsolete equipment.

选项 A、deficient
B、outdated
C、inferior
D、imperfect

答案B

解析 这句话的意思是:在大多数南美国家,铁路运输由于运营问题和______设备产生很多麻烦。在给出的选项中,deficient:缺乏的,不充分的;out dated:过时的,落伍的;inferior:次等的;imperfect:有缺点的,不完美的。根据题意,B项正确。
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