若关于x的方程x2+ax-1=0在(-1,2)内恰好有一个解,则a的范围是 __ 发布时间:2017-05-08 16:38 │ 来源:www.tikuol.com 题型:填空题 问题: 若关于x的方程x2+ax-1=0在(-1,2)内恰好有一个解,则a的范围是 ______.
题型:填空题 Though he failed many times in the election, he never lost _______ heart and at last was elected _________President of the USA. A./;a B. a;the C. his;the D./;/ 查看答案
题型:填空题 假设一个Movies表的主关键字是“电影名”字段,数据类型为文本,那么下列该主键字段值中不合理的是( )。A.Braveheart,Hollywood,Titanic,ChildhoodB.Braveheart,Hollywood,Titanic,MyUniversityC.Braveheart,Hero,MyUniversity,HeloD.Braveheart,Titanic,Hero,Skylover 查看答案