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GMAT 考满分题库

- 数学PS -
Three medical experts, working together at the same constant rate, can write an anatomy textbook in 24 days. How many additional experts, working together at this same constant rate, are needed to write the textbook in 9 days?
  • A2
  • B3
  • C5
  • D8
  • E15
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正确答案: C

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