1/4, 2/5, 5/7, 1, 17/14, () A. 25/17 B. 26/17 C. 25/19 D. 26/19 1/4, 2/5, 5/7, 1, 17/14, ()A. 25/17 B. 26/17 C. 25/19 D. 26/19 参考答案 查看答案