设3阶矩阵A的行列式|A|=8,已知A有2个特征值-1和4,则另一特征值为-2.( )
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一个特征向量可以属于多个特征值. ( )
A. 对
B. 错
设 λ=0 是n阶方阵A的特征值,则方程组 Ax=0 有非零解. ( )
A. 对
B. 错
By the end of this year, we surely ____ a satisfactory solution to the problems.
A. have found
B. will be finding
C. will have found
D. are finding
Not knowing what to do next, _____ his friends for advice.
A. will he go to
B. he is going to
C. did he go to
D. he went to
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