Sea levels are_____to rise between 7 and 23 inches by the end of 21st century. Sea levels are_____to rise between 7 and 23 inches by the end of 21st century.
Sea levels are_____to rise between 7 and 23 inches by the end of 21st century. Sea levels are_____to rise between 7 and 23 inches by the end of 21st century.
已知A=[1 2 3 ;4 5 6; 7 8 9]; 那么A(2:end,2:end)=?
已知A=[1 2 3 ;4 5 6; 7 8 9]; 那么A(2:end,2:end)=?
写出下面代码的运行结果( )def f(a,b=5,c=7...end=’ ’)print(f(10))
写出下面代码的运行结果( )def f(a,b=5,c=7...end=’ ’)print(f(10))
下列程序段的执行结果是（ ）。 x = 5: y = 7: z = 8 If x < y Then t = x: x = y: y = t End If If y < z Then t = y: y = z: z = t If x < y Then t = x: x = y: y = t End If End If Print x, y, z A: 8 5 7 B: 8 7 5 C: 5 7 8 D: 7 5 8
下列程序段的执行结果是（ ）。 x = 5: y = 7: z = 8 If x < y Then t = x: x = y: y = t End If If y < z Then t = y: y = z: z = t If x < y Then t = x: x = y: y = t End If End If Print x, y, z A: 8 5 7 B: 8 7 5 C: 5 7 8 D: 7 5 8
下面为某可变计数器的Verilog HDL代码，当A=1时，为7进制；当A=0时，为9进制。试补充完空白处代码。 module Alterable_Counter(A, clk, Q); input clk, A; output reg [3:0] Q; parameter N=7; parameter M=9; always @(posedge clk) begin if(A) begin if (__________) begin Q<=0; end else begin Q<=_______; end end else begin if (___________) begin Q<=0; end else begin Q<=Q+1; end end end endmodule
下面为某可变计数器的Verilog HDL代码，当A=1时，为7进制；当A=0时，为9进制。试补充完空白处代码。 module Alterable_Counter(A, clk, Q); input clk, A; output reg [3:0] Q; parameter N=7; parameter M=9; always @(posedge clk) begin if(A) begin if (__________) begin Q<=0; end else begin Q<=_______; end end else begin if (___________) begin Q<=0; end else begin Q<=Q+1; end end end endmodule
以下程序的执行结果是。 L = [1, 3, 5, 7, 9] print(L.pop(-3), end = ) print(L.remove(L[0]), end = ) print(L) A: 5 1 [3, 7, 9] B: 5 1 [1, 3, 7, 9] C: 5 None [3, 7, 9] D: 5 None [1, 3, 7, 9]
以下程序的执行结果是。 L = [1, 3, 5, 7, 9] print(L.pop(-3), end = ) print(L.remove(L[0]), end = ) print(L) A: 5 1 [3, 7, 9] B: 5 1 [1, 3, 7, 9] C: 5 None [3, 7, 9] D: 5 None [1, 3, 7, 9]
What does the author mean by saying, at the end of the passage," There is no silver bullet"(Line 4, Para. 7)?
What does the author mean by saying, at the end of the passage," There is no silver bullet"(Line 4, Para. 7)?
求下面矩阵的 Cholesky 分解 （다음 행렬의 Cholesky factorization을 구하시오）. \begin{bmatrix}<br/>1\ \,\, 3\ \,\, 7\\ <br/>3\ 10\ 26\\ <br/>7\ 26\ 75\\<br/>\end{bmatrix} A: \(U=\begin{bmatrix}<br/>1\ 3\ 7\\ <br/>0\ 1\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) B: \(U=\begin{bmatrix}<br/>1\ 2\ 7\\ <br/>0\ 3\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) C: \(U=\begin{bmatrix}<br/>1\ 3\ 7\\ <br/>0\ 2\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) D: \(U=\begin{bmatrix}<br/>1\ 3\ 1\\ <br/>0\ 1\ 5\\ <br/>0\ 0\ 7\\<br/>\end{bmatrix}\) E: \(U=\begin{bmatrix}<br/>1\ 2\ 7\\ <br/>0\ 3\ 1\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\)
求下面矩阵的 Cholesky 分解 （다음 행렬의 Cholesky factorization을 구하시오）. \begin{bmatrix}<br/>1\ \,\, 3\ \,\, 7\\ <br/>3\ 10\ 26\\ <br/>7\ 26\ 75\\<br/>\end{bmatrix} A: \(U=\begin{bmatrix}<br/>1\ 3\ 7\\ <br/>0\ 1\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) B: \(U=\begin{bmatrix}<br/>1\ 2\ 7\\ <br/>0\ 3\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) C: \(U=\begin{bmatrix}<br/>1\ 3\ 7\\ <br/>0\ 2\ 5\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\) D: \(U=\begin{bmatrix}<br/>1\ 3\ 1\\ <br/>0\ 1\ 5\\ <br/>0\ 0\ 7\\<br/>\end{bmatrix}\) E: \(U=\begin{bmatrix}<br/>1\ 2\ 7\\ <br/>0\ 3\ 1\\ <br/>0\ 0\ 1\\<br/>\end{bmatrix}\)
与方程组[img=178x71]180326360dd53c1.png[/img]等价的向量方程为？ A: [img=268x63]1803263618ad3d6.png[/img] B: [img=252x63]18032636222100e.png[/img] C: [img=268x63]180326362cd5ee7.png[/img] D: 7 \end{pmatrix}x_2+\begin{pmatrix}5\\5\\7 \end{pmatrix}x_3=\begin{pmatrix}0\\1\\3 \end{pmatrix}[img=268x63]18032636374ddf5.png[/img]
与方程组[img=178x71]180326360dd53c1.png[/img]等价的向量方程为？ A: [img=268x63]1803263618ad3d6.png[/img] B: [img=252x63]18032636222100e.png[/img] C: [img=268x63]180326362cd5ee7.png[/img] D: 7 \end{pmatrix}x_2+\begin{pmatrix}5\\5\\7 \end{pmatrix}x_3=\begin{pmatrix}0\\1\\3 \end{pmatrix}[img=268x63]18032636374ddf5.png[/img]
已知a为3×3矩阵，则a(:,end)与下列哪些指令相同？ A: a(:,3) B: a(7:9) C: a(7:9)' D: a(1:3,3)
已知a为3×3矩阵，则a(:,end)与下列哪些指令相同？ A: a(:,3) B: a(7:9) C: a(7:9)' D: a(1:3,3)