2. 外语
  3. Duties and taxes are the most obvious barrier to free trade. The underlined part means ______.

Duties and taxes are the most obvious barrier to free trade. The underlined part means ______.

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问题 Duties and taxes are the most obvious barrier to free trade. The underlined part means ______.
选项 A、influence
B、advantage
C、connection
D、obstruction
答案D
解析 barrier在这里是“壁垒，障碍，阻碍”的意思，D项obstruction“障碍，阻碍”与之相符。A项influence“影响，势力”；B项advantage“有利条件，益处”；C项connection“联系，关系，连接点”。
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专业英语四级

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