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【单选题】
当X服从参数为n,p的二项分布时，p=1-p,P{X=k}=( ).A.
p k q n-k
B.
C n k p k q n-k
C.
C n k p n-k q k
D.
p n-k q k
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反馈参考答案：
举一反三
【单选题】Je t'ai proposé ce film. = C'est que j'ai proposé ce film.
A.
te
B.
toi
C.
à te
D.
à toi
【单选题】They _____ to work. They’ll work at home instead.
A.
will go
B.
won’t go
C.
didn’t go
【单选题】I _____ home _______10 o’clock last night.
A.
not go; until
B.
not go; till
C.
don’t go; till
D.
didn’t go; until
【简答题】When I was a tiny baby crying all night, my mom sang to me and stayed by my side. When I was tired and hungry, she gave me food and warm arms to sleep 小题1: . When I was two 小题2: through the field, she...
【简答题】À propos
【单选题】We __________for a picnic if it ___________this Sunday.
A.
won’t go , will rain
B.
won’t go , rains
C.
didn’t go , is raining
D.
don’t go , don’t rain
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