• 2021-04-14
    下列程序的运行结果是( )。 x=[0,1,1,0,0]; y=[0,0,1,1,0]; for n=1:3 plot(n*x,n*y) hold on end axis equal
  • 3个左下角在原点的矩形

    内容

    • 0

      下列语句与y=(x>;0?1:x<;0?-1:0);语句功能相同是( ) A: if (x) if(x>;0) y=1; else if(x<;0) y=-1;else y=0; B: y=-1; if(x>;0) y=1; else y=-1; C: if (x>;0) y=1; else if(x<;0) y=-1; else y=0; D: y=0; if(x>;=0) y=1;else if(x==0) y=0; else y=-1;

    • 1

      如下程序的运行结果是( ) intx=1,y=1;if(x==1) y=x+1;elseif(y==2) x=y+1;else y=0; A: x=1, y=2 B: x=3, y=2 C: x=3, y=0 D: x=1, y=0

    • 2

      能够完成如下函数计算的程序段是( )。[img=128x73]18038b85af5fc28.png[/img] A: y=1;if(x!=0) if(x>0) y=1; else y=0; B: if(x>=0) if(x>0) y=1; else y=0;else y=-1; C: y=0; if (x>=0) if (x>0) y=1; else y=-1; D: y=-1;if (x>0) y=1;else y=0;

    • 3

      ‌设X ~ N ( 0 , 1 ),Y ~ N ( 0 , 1 ),且X与Y相互独立,则D(X – Y) = ( ).‏ A: 1 B: 2 C: 3 D: 4

    • 4

      The result of the following program is ( ).x=&#91;0,1,1,0,0&#93;; y=&#91;0,0,1,1,0&#93;; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points