2,1,6/7,4/5,10/13,( ) A. 4/3 B.3/4 C. 7

书海库2019-12-17  7

问题 2,1,6/7,4/5,10/13,( )A. 4/3 B.3/4 C. 7/15 D. 7/16

选项

答案B

解析[img]/upload/tiku/143/9543891_1.jpg[/img][img]/upload/tiku/143/9543891_1_1.jpg[/img]
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