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【单选题】
以下关于相关与回归的论述中,错误的是( )。A.
回归系数和相关系数的符号是一致的,其符号均可以用来判断变量之间的关系是正相关还是负相关
B.
两个分析同一组数据进行回归分析,得到两个不同的数学模型。模型一的决定系数R的平方为0.82,模型二的决定系数R的平方为0.75,说明模型一的模拟效果较模型二更佳
C.
EXCEL中,利用CORREL函数计算得到的两个变量的相关系数r=0.2,那么可以认为这两个变量不相关
D.
变量之间的线性相关程度越低,则相关系数r越接近于0
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举一反三
【单选题】He made a promise _____ he would treat me to dinner if I helped him with his housework,______ made me very excited．
A.
which; what
B.
that; what
C.
what; which
D.
that; which
【单选题】Though he had often made his little sister ______, today he was made ______ by his little sister.
A.
cry, to cry
B.
crying, crying
C.
cry, cry
D.
to cry, cry
【单选题】Not only _____ a promise, but also he kept it.
A.
he made
B.
did he make
C.
does he make
D.
has he made
【简答题】A．He was a foreigner. B．The spokesman made adverse remarks. C．He made false reports. D．He committed crime.
【简答题】He not only made a ______( 允诺 )but also he kept it.
【单选题】He often made his sister ______, but this time he was made ______ by his sister.
A.
cry; to cry
B.
cry; cry
C.
to cry; cry
D.
to cry; to cry
【单选题】After saying that, he ______ the door quickly.
A.
made up
B.
made for
C.
made out
D.
made
【单选题】_____________ that he did quite well in the exam.
A.
He made so rapid progress
B.
He made so rapid a progress
C.
His English made such rapid progress
D.
He made such rapid progress.
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