t=0:1:5产生行向量t,各元素为0、1、2、3、4、5
t=0:1:5产生行向量t,各元素为0、1、2、3、4、5
运行下面的程序后,输出的结果为 Cls Dim t(5,5)as Integer For i=1 To 5:t(i,i)=1:Next For i=1 To 5 For j=1 To 5 Print t(i,j), Next Print Next A. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 B.1 1 1 1 1 C.1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 D.1 1 1 1 1
运行下面的程序后,输出的结果为 Cls Dim t(5,5)as Integer For i=1 To 5:t(i,i)=1:Next For i=1 To 5 For j=1 To 5 Print t(i,j), Next Print Next A. 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 B.1 1 1 1 1 C.1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 D.1 1 1 1 1
已知T(1)=9,T(2)=8,T(0)=5,Total=T(1)+T(2)+T(0),则Total=()。
已知T(1)=9,T(2)=8,T(0)=5,Total=T(1)+T(2)+T(0),则Total=()。
已知T(1)=9,T(2)=8,T(0)=5,Total=T(1)+T(2)+T(0),则Total=()。 A: 9 B: 22 C: 8 D: 5
已知T(1)=9,T(2)=8,T(0)=5,Total=T(1)+T(2)+T(0),则Total=()。 A: 9 B: 22 C: 8 D: 5
产生周期为1的三角波信号,正确的代码是 A: t=0:1/1000:5;y=sawtooth(2*pi*t,0.5);号,正确的代码是 B: t=0:1/1000:5;y=sawtooth(2*pi*10*t,0.5);,正确的代码是 C: t=0:1/1000:5;y=square(2*pi*t,0.5);� D: t=0:1/1000:5;y=square(2*pi*10*t,0.5);
产生周期为1的三角波信号,正确的代码是 A: t=0:1/1000:5;y=sawtooth(2*pi*t,0.5);号,正确的代码是 B: t=0:1/1000:5;y=sawtooth(2*pi*10*t,0.5);,正确的代码是 C: t=0:1/1000:5;y=square(2*pi*t,0.5);� D: t=0:1/1000:5;y=square(2*pi*10*t,0.5);
关于通频带BW的表达式正确的说法有( ) A: BW只有△ω=ω0/Q一种形式; B: BW不仅有△ω=ω0/Q这一种形式 C: BW=f0/Q D: BW=1/Q
关于通频带BW的表达式正确的说法有( ) A: BW只有△ω=ω0/Q一种形式; B: BW不仅有△ω=ω0/Q这一种形式 C: BW=f0/Q D: BW=1/Q
下列Matlab代码,能求解微分方程 y'(t) = 2*t , y(0) = 1的是( ) A: tspan = [0 5];<br> y0 = 0;<br> [t,y] = ode45(@(t,y) 2*t, tspan, y0); B: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t, tspan, y0); C: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*y, tspan, y0); D: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t*y, tspan, y0);
下列Matlab代码,能求解微分方程 y'(t) = 2*t , y(0) = 1的是( ) A: tspan = [0 5];<br> y0 = 0;<br> [t,y] = ode45(@(t,y) 2*t, tspan, y0); B: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t, tspan, y0); C: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*y, tspan, y0); D: tspan = [0 5];<br>y0 = 1;<br>[t,y] = ode45(@(t,y) 2*t*y, tspan, y0);
【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]
有以下程序 main( ) { int t=1,i=5; for(;i>=0;i--) t*=i; printf(“%d\n”,t); } 执行后输出结果是___ A: -1 B: 0 C: 1 D: 2
有以下程序 main( ) { int t=1,i=5; for(;i>=0;i--) t*=i; printf(“%d\n”,t); } 执行后输出结果是___ A: -1 B: 0 C: 1 D: 2
已知元组 t=(1,2,3),则以下能在Python编译环境中正确执行的表达式是: A: t[0]+=1 B: t.append(4) C: t[0]=5 D: t[0]+t[1]
已知元组 t=(1,2,3),则以下能在Python编译环境中正确执行的表达式是: A: t[0]+=1 B: t.append(4) C: t[0]=5 D: t[0]+t[1]