问题
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What was the major change in agriculture during the 19th century?A.Crop production became
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What was the major change in agriculture during the 19th century?A.Specialized crops.B.Far
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The Canadian Pacific Railway was built in______which was one of the two major events in th
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According to David Savage, ______was a critical factor in determining peoples behavior. in
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A turbulent storm was a major factor in th
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A turbu1ent storm was a major factor in th