题海让大学四年没有难题
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单选题 Pfizer's(美国辉瑞公司的) patent in China, which is valid until 2014, could bar ______ producers from a market worth around 200 billion yuan

A. vulnerable

B. domestic

C. diligent

D. pessimistic

学科:大学英语

时间:2025-03-23 04:34:40

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