• 2022-05-28
    计算第二型曲线积分[tex=6.071x2.643]2bVGYLWaSFq0YhAHplc6ZXh0m3TPI+KyOebBquvhgJxc5lARUXl+3u/vcq8fBkO+qMjs9uQXFrlRtYzntwCg2g==[/tex]式中O为坐标原点,A点的坐标为(1,2)设:OA为直线段
  • 解:[tex=15.143x2.786]9+GRwgVfUKEFU/eUVNgLPeMRR4puig0mzhJd2VjIZOu5JtiDrGzmfxgwhGrmo2DugAe/aYm6fUYxkHYCGCBKGIXP7jhpXqJrrIMEHFhzGiA=[/tex]

    内容

    • 0

      平移坐标轴,将坐标原点移至O’(-1,1),则点(1,-3)在新坐标系中的坐标为( ) A: (0,-2) B: (-2,4) C: (2,-4) D: (-1,-3)

    • 1

      以下哪个点与坐标原点O的距离最近?( ) A: (0, 1, 2) B: (1 ,2, -2) C: (3, 2, 1) D: (2, 0, 3)

    • 2

      已知点P(-2,4),和Q(6,-6),则线段PQ的中点M的坐标为 A: (2,-1) B: (-1,2) C: (4,-5) D: (3,-3)

    • 3

      点(1,2,3)关于原点的对称点坐标为( ). A: (1,-2,-3) B: (-1,-2,-3) C: (-1,2,-3) D: (1,2,3)

    • 4

      set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}