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【单选题】
在同一正态总体中随机抽取含量为n的样本,理论上有95%的总体均数在范围内:A.
均数加减1.96倍的标准差
B.
均数加减2.58倍的标准差
C.
均数加减1.96倍的标准误
D.
均数加减2.58倍的标准误
E.
以上都不对
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举一反三
【单选题】.---What else did the teacher say? ---He advised us______ in the wetlands.
A.
shout
B.
not shout
C.
don’t shout
D.
not to shout
【单选题】I don’t think his success has a lot to do with good luck. It’s hard work ______ has made him what he is today.
A.
which
B.
that
C.
where
D.
why
【单选题】Don’t be angry . In this country ruled by law, he won’t _____ what he has done.
A.
get away from
B.
get away with
C.
put up with
D.
come up with
【单选题】I don’t believe the reason ____ he has given for not coming to the lecture.
A.
why
B.
that
C.
how
D.
what
【单选题】----What do you think will happen to him? ---- He has made ____ mess of the job, so I don't think he will have ____ happy ending. [ ]
A.
a; a
B.
a; /;
C.
/; a
D.
/; the
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