皮皮学，免费搜题
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【单选题】
The book has more than one author.A.
Y
B.
N
C.
NG
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举一反三
【单选题】Ground stations have been set up in order to avoid the problem of double time lag.
A.
Y
B.
N
C.
NG
【单选题】Yesterday I sent an email,（）to get some information about college program.
A.
hoped
B.
to hope
C.
hoping
D.
hope
【单选题】Yesterday I sent an e-mail， to get some information about college programs.
A.
hoped
B.
to hope
C.
hoping
D.
hope
【单选题】To avoid the problem of not having access to Tables of F distribution with values given for the lower tail, the numerator of the test statistic should be the one with
A.
the larger sample size
B.
the smaller sample size
C.
the larger sample variance
D.
the smaller sample variance
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