【单选题】Read the following sentences carefully. The questions that follow are designed to test your comprehension of complex grammatical structures. Select the best answer. The student revolt is not only a th...
【简答题】若干个能唯一确定一个数列的量称为该数列的“基本量”,设{a n }是公比为q的无穷等比数列,下列{a n }的四组量中,一定能成为该数列“基本量”的是第( )组。(写出所有符合要求的组号) ①S 1 与S 2 ;②a 2 与S 3 ;③a 1 与a n ;④q与a n 。其中n为大于1的整数, S n 为{a n }的前n项和