f(x)在点x0有定义是limf(x)存在的() A.充分非必要条件 B.必要非充分 发布时间:2018-01-19 17:00 │ 来源:www.tikuol.com 题型:单项选择题 问题: f(x)在点x0有定义是limf(x)存在的()A.充分非必要条件B.必要非充分条件C.充分必要条件D.无关条件
题型:单项选择题 Before personnel are lifted from a vessel in a personnel basket,the vessel should be().A.directly under the boomB.moving away from the boomC.stopped dead in the waterD.tied to the boom 查看答案