题目

连词成句 (1) favorite , is , subject , what , your ( ?) (2) her, is, science, favorite, subject ( . ) (3) do, like, why, you, art (?) (4) math, interesting, because, is ( . ) (5) is, who, teacher, P. E. , your ( ?) 答案:【1】What is your favorite subject? 【1】Her favorite subject is science. 【1】Why do you like art? 【1】Because math is interesting. 【1】Who is your P.E. teacher?下表是高三某位文科生连续次月考的历史、政治的成绩,结果统计如下:月份历史(分)政治(分)(1)求该生次月考历史成绩的平均分和政治成绩的方差;(2)—般来说,学生的历史成绩与政治成绩有较强的线性相关关系,根据上表提供的数据,求两个变量的线性回归方程.(附:, )
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