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讲座中学科术语理解 — 英语词汇题

托福(TOEFL) 听力:学术讲座 AI 三重审校通过

题目
In an economics lecture, the professor notes: "When a country's currency ______, its exports become cheaper for foreign buyers, which can temporarily improve the trade balance." Which term correctly completes the sentence? (A) appreciates (B) depreciates (C) stagnates (D) liberalizes