直线回归中,如果散点分布呈直线趋势,X增加时Y减少,则可初步判断()。 A.两变量呈 发布时间:2017-06-07 03:02 │ 来源:www.tikuol.com 题型:单项选择题 问题: 直线回归中,如果散点分布呈直线趋势,X增加时Y减少,则可初步判断()。A.两变量呈正相关关系B.两变量呈负相关关系C.两变量呈无相关关系D.b>0E.b<0
题型:单项选择题 阅读理解。Is this your computer game? Please call Karen at 8572360. Linda Lost: My school ID card. Please call 8973568. TonyFound: A set of keys Is this your set of keys? Please call Tim. Phone 3376859Tom, Is that your backpack in the lost and found case? Call me, please. Nick 1. If you lost your backpack, you may call _______. A. Linda B. Karen C. Nick D. Tim 2. Who lost his school ID card?A. Tony B. Nick C. Linda D. Karen 3. If you want to find your set of keys, Please call _______. A. Karen B. Nick C. Tim D. Tony 4. Tony's school ID card is lost, his telephone number is _______. A. 8793568 B. 8572360 C. 8973658 D. 8973568 查看答案
题型:单项选择题 求真务实不能也不可能一蹴而就,一劳永逸,彼时的“真”不能代表此时的“真”;彼事的“实”不能代表此事的“实”。其中蕴含的哲理是( )①事物的运动是绝对的、无条件的 ②真与假或虚与实是交织在一起的③要一切以时间、地点和条件为转移 ④事物的运动变化是不可捉摸的A.①③B.①②C.①④D.②③ 查看答案