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【单选题】
下面哪一个是White检验和BP检验的区别（）A.
White 检验是用来检验一个线性回归模型中是否存在异方差性的，而 BP 检验用来检验模型中是否存在共线性
B.
White 检验是用来检验一个线性回归模型中是否存在共线性的，而 BP 检验用来检验模型中是否存在异方差性
C.
White 检验中回归元个数多于 BP 检验中回归元个数
D.
BP 检验中回归元个数多于 White 检验中回归元个数
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举一反三
【单选题】Why did the man have a problem?
A.
Because he did not have a parking permit.
B.
Because he parked in a visitor's lot.
C.
Because he used a different car.
D.
Because he was not a student at the university.
【单选题】The old man is quite able to take care of himself, he has seen the elephant. The underlined par
A.
125. The old man is quite able to take care of himself, he has seen the elephant. The underlined part means _____. A．The old man knows the elephant.
B.
The old man once saw the elephant.
C.
The old man can take care of the elephant.
D.
The old man is full of experience.
【单选题】The______ the doctor faced was whether he should tell the patient the truth.
A.
dilemma
B.
paradox
C.
junction
D.
conflict
【单选题】John shut everybody out of the kitchen_____he could prepare his grand surprise for the party.
A.
which
B.
when
C.
so that
D.
as if
【单选题】Which one is true about the man's experience?
A.
He is good at debating.
B.
Once he took a part time job as a student.
C.
He likes sticking to the same job.
D.
He knows something about advertising.
【单选题】During / At / For that year, he worked par-time for the students’ Union.
A.
During
B.
At
C.
For
【简答题】无论是两项资产还是多项资产构成的投资组合，投资组合的收益率都不会低于所有单个资产中的最低收益率，投资组合的风险也不会高于所有单个资产中的最高风险。()
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