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【单选题】
设随机变量X～t(n)(n＞1)，Y＝1／X2，则______．A.
Y－X2(N)
B.
Y－X2(n－1)
C.
Y－F(n，1)
D.
Y～F(1，n)
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举一反三
【单选题】The chief editor thought he took some liberties with the original in translation. So it was necessary that he make the ______ suggested.
A.
alterations
B.
alternatives
C.
alternations
D.
altercation
【简答题】A．Leona hadn't spoken to Wilbur in five years. B．Leona thought Wilbur belittled her. C．Wilbur hadn't phoned or written to Leona in five years. D．Wilbur' harmed Leona's pet, Duchess.
【单选题】在外宾团的首站地接站时,全陪的主要任务是(),并与领队接洽做好相关协助工作。p98
A.
认找旅游团
B.
安排旅游车
C.
清点和交接行李
D.
配合地陪迅速认找到旅游团
【单选题】The chief editor thought he took some liberties with the original in translation. So it was necessary that he make the ______ suggested.
A.
alterations
B.
alternatives
C.
alternations
D.
altercations
【单选题】Although he thought he was helping us to prepare the dinner, he was actually ______ the way.
A.
in
B.
off
C.
by
D.
on
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