A.315 B.215 C.115 D.96A两两做商得1,3,5,7,9,答案为35*9=315

tikufree2019-12-17  8

问题

选项 A.315B.215C.115D.96

答案A

解析两两做商得1,3,5,7,9,答案为35*9=315
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