作为全面评价比较总体的方法,必须抓住数据的()特征进行综合分析。
A.描述统计
B.推断统计
C.集中趋势
D.离中趋势
参考答案:C, D
--Peter shut his mouth at the meeting all the time. How about Tom?
______________.
A.He does so
B.He did so
C.So does he
D.So did he
卡莱尔运用解析几何解一元二次方程的解法。