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If, in 2010, there were a total of 500 million smartphones, then there were more than 50 million of which of the following types of smartphones?
Indicate all such types.
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A.aOS
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B.Brownberry
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C.Other
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D.Robot
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E.Symbilan
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F.VistaPhone 8
A,B,D,E,F显示答案
