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【简答题】
In recent years, many college students have moved out of dormitory. They think they will have more freedom to live out of campus. But some colleges do not approve of this practice, some even suggest rules to forbid it. What is your opinion on this issue? Write a composition of about 400 words to express your idea. In the first part of your writing you should present your thesis statement, and in the second part you should support your thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion or a summary. You should supply an appropriate title for your essay-Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks.
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【简答题】执行下列指令组后, (A) =( ) , 标志位( OV )=( ) ,(P) =( ) MOV A,#0B4H ADD A,#001H SUBB A,#51H
【简答题】执行下列指令组后, (A) =( ) , 标志位( OV )=( ) ,(P) =( ) MOV A,#0B4H ADD A,#001H SUBB A,#51H
【单选题】A,B都是真实值k的无偏估计向量,如果COV(A)-COV(B)为非负定矩阵,则下列说法正确的是()
A.
A是k的无偏最有效估计
B.
B是k的无偏最有效估计
C.
A和B相比较，A是更有效的估计
D.
A和B相比较，B是更有效的估计
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