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【判断题】
只有在两变量之间确实存在线性相关关系,而且相关的密切程度显著时,才能拟合回归方程y c =a+bx。( )
A.
正确
B.
错误
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【单选题】Peter graduated from college in June and started his work in the auto company in August. __________, he took a trip around the country.
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【简答题】Peter graduated from college in June and started his work in the auto company in August. ______ the interim, he took a trip around the country.
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