Industrial output has grown by an average of（）annually since tariff barriers were eliminated in 1977.
- A、3%
- B、5%
- C、8%
- D、10%
正确答案:B
答案解析:有
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00522英语国家概况
00522英语国家概况
Industrial output has grown by an average of（）annually since tariff barriers were eliminated in 1977.
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