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【判断题】
最短杆与最长杆之和大于等于等于其余两杆长度之和是杆长和条件。
A.
正确
B.
错误
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【单选题】A,B为n阶矩阵,若(A+B)(A-B)≠A^2-B^2,则必有( )
A.
A=I
B.
A=-B
C.
A=B
D.
AB≠BA
【简答题】阅读理解。 CBS News-Veteran(资深的)broadcast journalist Mike Wallace died at 93 on April 7, 2012. He had been in declining health in recent years but the cause of death has yet to be released. 'It is with eno...
【单选题】-Aren't you from Dandong? -___________. I'm from Shenyang.
A.
Yes, Im not.
B.
Yes, I am.
C.
No, I'm not.
D.
No, I am.
【单选题】设A和B均为n×n矩阵,则必有 A.|A+B|=|A|+|B|.
B.
AB=BA.
C.
|AB|=|BA|.
D.
(A+B)-1=A-1+B-1.
【单选题】You are from Australia,aren't you? _________ . I 'm from Canada.
A.
Yes, I am
B.
Yes, I'm not
C.
No, I'm not
【简答题】请仔细阅读题,从A、B、C、D中找出其相对应的内容, 并回答小题 小题1:My philosophy(哲学) of life is work. When work is a pleasure, life is joy! When work is duty, life is slavery(苦役). 小题2:Bill Bowl always felt sad. His friend told him...
【简答题】设A为正定Hermite矩阵,B为反Hermite矩阵.试证明:AB与BA的特征值实部为零. (2)设A是n(n>1)阶正定矩阵.α是非零列向量,且α∈Rn.令B=AααT,求B的最大特征值以及B的属于这个特征值的特征子空间的维数和一个基.
【判断题】根据会计要素的划分,企业设置的所有账户可划分为六类。
A.
正确
B.
错误
【判断题】计算元件功率不能使用叠加定理。A. √ B. ×
A.
正确
B.
错误
【简答题】将单词与相应句子的空格部分连接A. Her lawyer said that she understood the____________ of her action.B. New ____________ in medicine improve thequality of health care.C. Without friends, he felt ____________ inthe cit...
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