2 0 0 0 0 0 5 0 0 2 2 0 0 0 1 4 7X的校验码X为()。(计算同13位)
举一反三
- 【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]
- 利用积分法求梁的位移时,边界条件、连续条件是()[img=278x125]17e0b245ad73aa5.jpg[/img] A: x=0,w1=0;x=a+l,w2=0;x=a,w1=w2,θ1=θ2 B: x=0,w1=0;x=a+l,w2=0,θ2=0;x=a,θ1=θ2 C: x=0,w1=0;x=a+l,w2=0,θ2=0;x=a,w1=w2 D: x=0,w1=0;x=a+l,θ2=0;x=a,w1=w2,θ1=θ2
- 在MATLAB中,用命令x=1:9生产数组x。现在要把数组x的第2个和第7个元素都赋值为0,键入的指令是( ) A: x([2 7])=(0 0) B: x([2 7])=[0 0] C: x[(2 7)]=[0 0] D: x[(2 7)]=(0 0)
- 以下与数学表达式"0 A: (0 B: 0 C: x>0 && x<5 && x!=2 D: (x>0 && x<2) || (x>2 && x<5)
- 能够完成如下函数计算的程序段是____. A: y=2*x+1;if(x!=0)if(x>0)y=5*x+20;elsey=0; B: if(x>=0)if(x>0)y=5*x+20;elsey=0;elsey=2*x+1; C: y=0;if(x>=0)if(x>0)y=5*x+20;elsey=2*x+1; D: y=2*x+1;if(x>0)y=5*x+20;elsey=0;