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【单选题】
The example of the English schoolboy was used to show that ______.A.
English schoolboys respect teachers more than they respect their friends
B.
young people have different ways to ask time from the previous generations
C.
younger generations vary their speeches more than the previous generations
D.
even the same person will speak in different ways in different contexts
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皮皮学刷刷变学霸
举一反三
【单选题】设A，B为满足AB＝0的任意两个非零矩阵，则必有
A.
A的列向量组线性相关，B的行向量组线性相关．
B.
A的列向量组线性相关，B的列向量组线性相关．
C.
A的行向量组线性相关，B的行向量组线性相关．
D.
A的行向量组线性相关，B的列向量组线性相关．
【简答题】简述复合型时间序列的预测步骤。