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【简答题】
设随机变量X 1 ，X 2 ，X 3 相互独立，且都服从参数0＜p＜1的两点分布．考虑随机变量 ，与 ，求函数Z=UV的分布律．
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举一反三
【单选题】We wish we ______ there two hours earlier.
A.
arrived
B.
arrive
C.
had arrived
D.
will arrive
【简答题】We wish to state that if the account be not paid by next Monday,we shall be forced to place the matter in the hands of our solicitors.
【单选题】关于旅游的本质属性的叙述 , 错误 的是
A.
随着社会的进步，人们对旅游的观念也在不断发生变化
B.
自然旅游资源是天赋的自然地理条件，并不具备文化内涵
C.
经济因素对旅游者的产生起着决定性作用
D.
旅游是人们生活水平提高、超出生存需要的一种高级消费形式
【单选题】______ we wish him prosperous, we have objections to his ways of obtaining wealth.
A.
Much as
B.
As much
C.
More as
D.
As well as
【单选题】We wish to make it clear to you that we shall not( ) the shipment if they arrive after December 15,2000.
A.
arrange
B.
receive
C.
accept
D.
acknowledge
【单选题】We wish we ______ go for an outing next week. Of course, _______ , we surely counldn't go. [ ]
A.
can, if it rained
B.
could, were it to rain
C.
can, if it rains
D.
could, if it would rain
【单选题】We are pleased to note that you wish to expand our relationship ,()suggest that we consider the matter of agency later .
A.
and
B.
but
C.
however
D.
nevertheless
【单选题】We wish to ______ that it is only in view of our long friendly business relations that we extend you this accommodation, in payment.
A.
reiterate
B.
repeat
C.
revert
D.
relate
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