因式分解 (1)25x2-81y2 (2)x3-2x2y+xy2 (3)x4-1 发布时间:2017-05-09 05:43 │ 来源:www.tikuol.com 题型:解答题 问题: 因式分解(1)25x2-81y2 (2)x3-2x2y+xy2 (3)x4-18x2+81.
题型:解答题 The past two years ________ a sharp rise in oil price, which adds to the burden of auto transportation industry. A.witnessed B.has witnessed C.is witnessing D.witnesses 查看答案