• 2021-04-14 问题

    用符号“∈”或“∉”填空 (1)0 N; (2) 0.6 Z; (3)π R; (4)1/3 Q; (5)0 ∅

    用符号“∈”或“∉”填空 (1)0 N; (2) 0.6 Z; (3)π R; (4)1/3 Q; (5)0 ∅

  • 2022-05-30 问题

    选择符号填空(A:"∈", B:"∉")。(1)0 N;(2) 0.6 Z;(3)π R;(4)1/3 Q;(5)0 ∅

    选择符号填空(A:"∈", B:"∉")。(1)0 N;(2) 0.6 Z;(3)π R;(4)1/3 Q;(5)0 ∅

  • 2022-06-19 问题

    下列程序段的执行结果为______。 x = 0: y = 1 z = 1: n = 0 Do x = x + y + z n = n + 1 Loop While x < 10 Print x; n A: 10 5 B: x n C: 9 5 D: 10 6

    下列程序段的执行结果为______。 x = 0: y = 1 z = 1: n = 0 Do x = x + y + z n = n + 1 Loop While x < 10 Print x; n A: 10 5 B: x n C: 9 5 D: 10 6

  • 2022-07-23 问题

    有如下程序段: Dim i%, j%, n%, m%, k% m = 0 : k = 0 For i = 1 To 5 k = k + 1 n = 0 For j = 1 To 2 n = n + 1 m = m + 1 Next j Next i MsgBox(k & " " & n & " " & m)运行该程序代码段后,消息对话框中显示的内容为( )。 A: 5 10 2 B: 5 10 10 C: 5 2 10 D: 5 2 2

    有如下程序段: Dim i%, j%, n%, m%, k% m = 0 : k = 0 For i = 1 To 5 k = k + 1 n = 0 For j = 1 To 2 n = n + 1 m = m + 1 Next j Next i MsgBox(k & " " & n & " " & m)运行该程序代码段后,消息对话框中显示的内容为( )。 A: 5 10 2 B: 5 10 10 C: 5 2 10 D: 5 2 2

  • 2021-04-14 问题

    【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]

  • 2021-04-14 问题

    已知()x()(()n())()的()z()变换是()X()(()z())(),()ROC()是()|()z()|()>()a(),则()x(()-()n()-()5())()的()z()变换和()ROC()是()()A.()()z()-()5()X()(1/()z()),z()>()1/()a()B.()()z()5()X()(1/()z()),z()>()1/()a()C.()()z()-()5()X()(1/()z()),z()<()1/()a()D.()()z()5()X()(1/()z()),z()<()1/()a

    已知()x()(()n())()的()z()变换是()X()(()z())(),()ROC()是()|()z()|()>()a(),则()x(()-()n()-()5())()的()z()变换和()ROC()是()()A.()()z()-()5()X()(1/()z()),z()>()1/()a()B.()()z()5()X()(1/()z()),z()>()1/()a()C.()()z()-()5()X()(1/()z()),z()<()1/()a()D.()()z()5()X()(1/()z()),z()<()1/()a

  • 2022-07-26 问题

    下列哪条语句是正确的( ) A: A=[1 2;3 4];B=[3;7];A.*B; B: A=cell(2,3);A(1,2)=[4;5]; C: A=[2 3 5 7;9 4 6 1;7 3 2 5];B=[1 7;0 5];A(2:end,2:2:end) D: x=-5:5;y=-5:5;z=x.*x-y.*y;surf(x,y,z);

    下列哪条语句是正确的( ) A: A=[1 2;3 4];B=[3;7];A.*B; B: A=cell(2,3);A(1,2)=[4;5]; C: A=[2 3 5 7;9 4 6 1;7 3 2 5];B=[1 7;0 5];A(2:end,2:2:end) D: x=-5:5;y=-5:5;z=x.*x-y.*y;surf(x,y,z);

  • 2022-06-04 问题

    下面程序执行的结果是 。#include<;stdio.h>;int f(int );int main(){int z;z=f(5);printf("%d\n",z);return 0;}int f(int n){if(n==1||n==2)return 1;elsereturn f(n-1)+f(n-2);}

    下面程序执行的结果是 。#include<;stdio.h>;int f(int );int main(){int z;z=f(5);printf("%d\n",z);return 0;}int f(int n){if(n==1||n==2)return 1;elsereturn f(n-1)+f(n-2);}

  • 2022-05-29 问题

    描述一个正整数n能同时被3,5和7同时整除的正确表达式为 A: n//3==0 and n//5==0 and n//7==0 B: n//3==0 or n//5==0 or n//7==0 C: n%3==0 and n%5==0 and n%7==0 D: n%3==0 or n%5==0 or n%7==0

    描述一个正整数n能同时被3,5和7同时整除的正确表达式为 A: n//3==0 and n//5==0 and n//7==0 B: n//3==0 or n//5==0 or n//7==0 C: n%3==0 and n%5==0 and n%7==0 D: n%3==0 or n%5==0 or n%7==0

  • 2021-04-14 问题

    【单选题】如图示代码,下面哪个是正确的输出结果 A. 0  1  2  3  4  5 B. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 C. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 D. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5

    【单选题】如图示代码,下面哪个是正确的输出结果 A. 0  1  2  3  4  5 B. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 C. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 D. 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5 0  1  2  3  4  5

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