According to historians and specialists in demography,there are（）great population movement(s)in the history of the United States.
- A、four
- B、three
- C、five
- D、None of the above
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00522英语国家概况
00522英语国家概况
According to historians and specialists in demography,there are（）great population movement(s)in the history of the United States.
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