正常中性粒细胞约占白细胞总数的 A: 0~1% B: 0~7% C: 2%~8% D: 20%~40% E: 50%~70%
正常中性粒细胞约占白细胞总数的 A: 0~1% B: 0~7% C: 2%~8% D: 20%~40% E: 50%~70%
如图所示单元体的三个主应力为 A: σ1=30,σ2=0,σ3=-50 B: σ1=50,σ2=30,σ3=-50 C: σ1=50,σ2=0,σ3=-50 D: σ1=50,σ2=30,σ3=0
如图所示单元体的三个主应力为 A: σ1=30,σ2=0,σ3=-50 B: σ1=50,σ2=30,σ3=-50 C: σ1=50,σ2=0,σ3=-50 D: σ1=50,σ2=30,σ3=0
图示应力状态的主应力σ1,σ2,σ3的值为( )[img=104x96]180347ed2b155b8.png[/img] A: σ1=50,σ2=50,σ3= -50 B: σ1=50,σ2=50,σ3=50 C: σ1=50,σ2=50,σ3=0 D: σ1=50,σ2=0,σ3=0
图示应力状态的主应力σ1,σ2,σ3的值为( )[img=104x96]180347ed2b155b8.png[/img] A: σ1=50,σ2=50,σ3= -50 B: σ1=50,σ2=50,σ3=50 C: σ1=50,σ2=50,σ3=0 D: σ1=50,σ2=0,σ3=0
设\(E\)是初等阵,表示第3行减去第1行的7倍,则\(E^{-1}=\) A: \(\begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ -7 & 0 & 1 \end{pmatrix}\) B: \(\begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 7 & 0 & 1 \end{pmatrix}\) C: \(\begin{pmatrix} 1 & 0 & -7 \\ 1 & 0 & 0 \\ 0 & 0 & 1 \end{pmatrix}\)
设\(E\)是初等阵,表示第3行减去第1行的7倍,则\(E^{-1}=\) A: \(\begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ -7 & 0 & 1 \end{pmatrix}\) B: \(\begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 7 & 0 & 1 \end{pmatrix}\) C: \(\begin{pmatrix} 1 & 0 & -7 \\ 1 & 0 & 0 \\ 0 & 0 & 1 \end{pmatrix}\)
如图所示单元体的三个主应力为[img=199x211]17869506173a409.jpg[/img] A: σ1=30,σ2=0, σ3=-50 B: σ1=50,σ2=30, σ3=-50 C: σ1=50,σ2=0, σ3=-50 D: σ1=50,σ2=30, σ3=0
如图所示单元体的三个主应力为[img=199x211]17869506173a409.jpg[/img] A: σ1=30,σ2=0, σ3=-50 B: σ1=50,σ2=30, σ3=-50 C: σ1=50,σ2=0, σ3=-50 D: σ1=50,σ2=30, σ3=0
如图所示单元体的三个主应力为[img=199x211]17da68e5a3a1ffa.jpg[/img] A: σ1=50,σ2=0, σ3=-50 B: σ1=30,σ2=0, σ3=-50 C: σ1=50,σ2=30, σ3=-50 D: σ1=50,σ2=30, σ3=0
如图所示单元体的三个主应力为[img=199x211]17da68e5a3a1ffa.jpg[/img] A: σ1=50,σ2=0, σ3=-50 B: σ1=30,σ2=0, σ3=-50 C: σ1=50,σ2=30, σ3=-50 D: σ1=50,σ2=30, σ3=0
int x = 1, y =6; A: x = 6 y = 0 B: x = 7 y = 0 C: x = 6 y = -1 D: x = 7 y = -1 E: Compilation fails.
int x = 1, y =6; A: x = 6 y = 0 B: x = 7 y = 0 C: x = 6 y = -1 D: x = 7 y = -1 E: Compilation fails.
表达式7||8和7|8的值分别是 A: 0 1 B: 1 1 C: 1 15 D: 0 15
表达式7||8和7|8的值分别是 A: 0 1 B: 1 1 C: 1 15 D: 0 15
已知a=[1 2 3;5 6 7];b=[0 2 1;0 7 7];c=a==b,则c等于
已知a=[1 2 3;5 6 7];b=[0 2 1;0 7 7];c=a==b,则c等于
【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]