设X1,X2,…,Xn为总体的一个样本,x1,x2,…,xn为一相应的样本值.求下述各总体的密度函数或分布律中的未知参数的矩估计量和估计值.
第1题
(非英语专业学生做)(Para. 4, Passage 3)In hundreds of other ways, we show that we are creatures of habit, following fixed patterns of behavior. This characteristic can help us to survive but it can be a barrier to progress too.
第2题
第3题
By learning the other s ways of talking, we may______.
A.keep our disagreements under control
B.forget about our disagreements
C.accuse the other of being selfish
D.find out the other" s weakest point
第4题
We have good manners to show that we ______.
A.are different from others
B.begin all manners in the same way
C.want to be friendly with other people
D.don't want people to trouble us
第5题
第6题
By saying “... we’re going to look the other way in terms of what our laws are” (Line 2, Para. 4), Mayor Anderson means “________”.
A) we will turn a blind eye to your illegal status
B) we will examine the laws in a different way
C) there are other ways of enforcing the law
D) the existing laws must not be ignored
第7题
We have to collect enough evidence to show that we ________ a lot of damages.
A suffers
B suffer
C have suffered
第8题
Our statistics show that we consume all that we are capable of producing.
A.waste
B.buy
C.use
D.sell
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