设(S_{n})为等差数列({a_{n}})的前(n)项和,若( dfrac {S_{1}}{S_{4}}= dfrac {1}{10}),则( dfrac {S_{3}}{S_{5}}=() ()) A. ( dfrac {2}{5}) B. ( dfrac {3}{5}) C. ( dfrac {3}{7}) D. ( dfrac {4}{7}) 查看完整题目与答案 提出当代贸...