中心在原点,焦点在x轴上,若长轴长为18,且两个焦点恰好将长轴三等分,则此椭圆的 发布时间:2017-04-26 11:56 │ 来源:www.tikuol.com 题型:填空题 问题: 中心在原点,焦点在x轴上,若长轴长为18,且两个焦点恰好将长轴三等分,则此椭圆的方程是___________.
题型:填空题 I _________ my pet dog Huan Huan. But I can't _________ it. [ ]A. look for; finding B. am finding; look for C. am looking for; find D. find; look for 查看答案