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【简答题】
设向量α=(1，0，-1) T ，矩阵A=αα T ，n为正整数，a为常数，则aE=A n 的全部特征值是______；行列式aE-A n =______.
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【单选题】What effect does the definition of success have on one's selection of opening up a business?
A.
It helps to determine whether it is necessary to start a business.
B.
It helps to decide how great a business success is.
C.
It helps to further provide a business opportunity.
D.
It helps to evaluate the business potential effectively.
【单选题】It can be inferred from the passage that the author believes
A.
there are few honest businessmen.
B.
the rich are the same as thieves in their accumulation of wealth.
C.
robbers are also benefactors to society seen from a different angle.
D.
equal distribution of property leads to increase of consumer demand.
【简答题】局域网的拓扑结构有哪些？
【简答题】戏曲服装的“三不分”指 、 、 。
【单选题】A busines will not receive payment from customers who owes them money because:
A.
The customer has left the country
B.
The customer is bankrupt
C.
The customer is deceased
D.
All of the above
【简答题】The company is trying every means to ______ the wholesale price of its products A) pull down B) put down C) set down D) bring down
【单选题】What can be inferred from the last paragraph?
A.
Coffee is a kind of beverage.
B.
Too much coffee may endanger people's life.
C.
Coffee is good for busy people.
D.
Coffee can cure disease.
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