题目详情
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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