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单项选择题 Given: Which statement is true?()

A、The output could be 5-1 6-1 6-2 5-2

B、The output could be 6-1 6-2 5-1 5-2

C、The output could be 6-1 5-2 6-2 5-1

D、The output could be 6-1 6-2 5-1 7-1

  • B
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