题型:选择题 已知两个变量x,y具有线性相关关系,并测得(x,y)的四组值分别是(2,3)、(5,7)、(8,9)、(11,13),则求得的线性回归方程所确定的直线必定经过点A (2,3) B (8,9) C (11,13) D (6.5,8) 查看答案
题型:填空题 根据所给单词完成句子。 1. I hope (visit) Hawaii one day. 2. You are not (suppose) to eat with your hands. 3. (general) speaking, girls like dressing up. 4. Shanghai is one of the _ ( live) cities in the world. 5. Are you _ (will) to help others? 查看答案