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【单选题】
设随机变量X的分布律为P(X=k)= ,其中k=1,2,......,N,则常数a=A.
1
B.
2
C.
3
D.
4
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皮皮学刷刷变学霸
举一反三
【单选题】Where can you find this passage?
A.
In a car magazine.
B.
In an advertisement.
C.
In a newspaper.
D.
In a science book.
【单选题】Where can you possibly find this passage?
A.
In a political journal.
B.
In a fashion magazine.
C.
In a tourist handbook.
D.
In a literature review.
【单选题】Where can you find this sign?
A.
at a movie theatre
B.
at an airport
C.
at a restaurant
【单选题】Where can we most probably find this passage?
A.
A science magazine.
B.
A travel journal.
C.
A daily newspaper.
D.
A textbook.
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