• 2021-04-14
    图示正方形对x,y轴的惯性矩阵和惯性积分别为Ix,Iy和Ixy,下列结论中哪些是正确的?( ) (1)Ix=Iy; (2)Ix’=Iy’; (3)Ix=Ix’; (4)Ixy=Ix’y’http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/06df735ae8734b3f995cf9274f091650.png
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    • 0

      void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=++iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX– –;iN=– –iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }

    • 1

      图示正方形对x,y轴的惯性矩阵和惯性积分别为ix,

    • 2

      设函数f: X→Y,则下面正确的是( )。 A: f ∘ IX=f B: IX∘f=f C: f∘IY=f D: IY∘ f=f

    • 3

      设iX=2,iY=3, ch='a',则表达式iZ = (iX || iY)&&(ch>'A')的值是1

    • 4

      #include "stdio.h" void main() { int iX,iY,iM,iN; iX=10;iY=20; iM=iX++;iN=iY++; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); iM=iX--;iN=--iY; printf("iX=%d,iY=%d,iM=%d,iN=%d",iX,iY,iM,iN); }