小雪和小敏的藏书册数比是7:5，如果小雪送65本给小敏，那他们之间的藏书册数比是3:4，那么，小敏原来

的藏书是多少册？

A．175

B．245

C．420

D．180

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第1题

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第2题

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第3题

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第4题

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第5题

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第6题

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