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【单选题】
设 X~N(μ,4 2 ) , Y~N(μ,5 2 ) , p 1 =P(X≤μ-4) , p 2 =P(Y≥μ+5) ,则( ) .A.
对任意的 μ ， p 1 = p 2
B.
对任意的 μ ， p 1 > p 2
C.
对任意的 μ ， p 1 2
D.
只个别的 μ ， p 1 = p 2
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反馈参考答案：
举一反三
【单选题】tumble
A.
annoy or offend sb.
B.
fall down quickly and suddenly
C.
climb up quickly and suddenly
D.
force sb. to leave a place
【单选题】The farmer grows various kinds of crops, __________wheat, cotton and rice.
A.
for example
B.
as
C.
that is
D.
such as
【简答题】Students read various kinds of books in it.
【单选题】On New Year’s Eve, various kinds of food are prepared in order to menisfest their devotion to ______.( )
A.
friends
B.
relatives
C.
ansestors
【单选题】By piecing together all kinds of evidence collected by various expeditions, the researchers believe the Mayas to be Indians, whose ancestors had come from Asia.
A.
Y
B.
N
C.
NG
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