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相关系数r≠0则说明两个变量相关

A. 对
B. 错

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相关系数ρ≠0则说明两个变量相关

A. 对
B. 错

r≠0,则说明一个变量的改变会导致另一个变量的改变

A. 对
B. 错

What is innovation according to Jack Ma in his speech ?

Do you think it is important to develop people’ s ability tosee things in fresh ways? Why or why not?

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