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【单选题】
对含有两个随机变量的同一批资料，既作直线相关分析，又做直线回归分析。设相关系数检验的t值为tr，回归系数检验的t值为tb，两者之间具有的关系是A.
tr＞tb
B.
tr＜tb
C.
两者大小关系不能肯定
D.
tr＝tb
E.
tr＞tb或tr＝tb
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举一反三
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A.
He had no money to buy books.
B.
The books he wanted were always out at the library.
C.
The books he liked were prohibited to circulate, but only for library use.
D.
He was too young to borrow the “immoral” books.
【单选题】Please just tell me anything ______ you know about the author of the book.
A.
what
B.
that
C.
which
D.
when
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【简答题】钻石的净度是在 倍放大镜下观看的。
【单选题】Please tell me everything _______ you know about the author of the book.
A.
which
B.
that
C.
how
D.
what
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