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B、outdated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 译文为:在大多数南美国家,铁路运输受到运营问题和过时设备的困扰。obsolete过时的。deficient不充分的;outdated过时的;inferior次等的;imperfect不完美的。
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