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【单选题】
一组服从双变量正态分布的资料,经直线相关分析得相关系数r=-1,则有A.
SS总=SS残
B.
SS总= SS回
C.
MS残=MS回
D.
MS残=MS回
E.
MS残=MS总
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反馈参考答案：
举一反三
【单选题】For some time now, ______ has been presumed not to exist: the cynical conviction that everybody has an angle is considered wisdom.
A.
rationality
B.
flexibility
C.
disinterestedness
D.
insincerity
【单选题】The price has been decided unless something emergent ______.
A.
will occur
B.
occurs
C.
occured
D.
occurring
【单选题】The housing price has been ( ), and has become increasingly unaffordable in recent years.
A.
plunging
B.
soaring
C.
adding
D.
ascending
【单选题】The price has been .Can you go and buy one?A．gone upB．brought upC．gone offD．brought down
A.
The price has been____.Can you go and buy one? A．gone up
B.
brought up
C.
gone off
D.
brought down
【单选题】For some time now, Eric ______ for foreign trade.
A.
had been working
B.
was working
C.
has been working
D.
worked
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