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【单选题】
如果∣ei∣与√Xi之间存在线性关系，则认为异方差形式为（）A.
A
B.
B
C.
C
D.
D
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【简答题】morning is best time for work.
【单选题】Run, Rabbits, Run From Greenwich to the Mall is good sport for all In its 13 years, the London Marathon has acquired a pedigree of excellence. That excellence is not just the awesome energy of the bes...
A.
pay an entrance fee
B.
assemble in one specific area
C.
be able to run 26 miles, 385 yards
D.
compete for the right to take part
【单选题】听力原文：W: I'm looking for the best quality paper to have my thesis typed on. I don't see any on the shelf. M: I think I saw some in the stockroom this morning. I'll check. Q: what did the man tell the w...
A.
He'll see if they have more paper.
B.
She's bound to find it somewhere else.
C.
The paper she wants is out of stock.
D.
He can't accept a check.
【简答题】Harry is from London. But he is in China with his parents now. He is 13 years old. He is a student of Grade 7. Harry is a clever student. He works very hard. He is good at all his lessons. He says he ...
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