In the disciplines underlying our high-tech economy, America is steadily losing its global edge.

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问题 In the disciplines underlying our high-tech economy, America is steadily losing its global edge.

选项 A、border
B、superiority
C、appeal
D、territory

答案B

解析 edge：边缘，优势，edge-cutting：先进的；border：边境，界限，边界；superiority：优势，优越；appeal：魅力，诱惑力；territory：领土，活动范围，领地，领域

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