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【单选题】
某校经济管理类的学生学习统计学的时间(x)与考试成绩(y)之间建立线性回归方程 。经计算,方程为 ,该方程参数的计算( )。A.
a值是明显不对的
B.
b值是明显不对的
C.
a值和b值都是不对的
D.
a值和b值都是正确的
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举一反三
【简答题】异位妊娠最常见的病因是______。
【单选题】He______a drink for the sake of the drink, but only to know the kind of life in the east !
A.
needn't have had
B.
would have had
C.
did have
D.
would not have had
【单选题】Why did the small man come to the party?
A.
He came to ask for a drink.
B.
He came in to look for someone.
C.
He came to ask for help.
【单选题】Why did Mr Harken often Nick a drink at 8:15 a.m. in the office?
A.
Tow show trust.
B.
To prove he's a drunk later.
C.
To avoid wasting the drink.
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