• 2022-06-09
    求下列函数的傅氏变换:[tex=8.643x2.786]yA9VxGgWFghS/CdxQGqmXafp3MXem12ZiXl9Y6j8S1Yl5ipgrbTD0R/2CW2tb6c1fwsT10z5vWTau6hY3KC1C+MubzzrfyleXp0y2tdbgvDky+53Lb242vF7GkBvIY+h[/tex]
  • [tex=15.071x9.214]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[/tex].

    举一反三

    内容

    • 0

      设DES加密算法中的一个S盒为: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13 若给定输入为101101,则该S盒的输出的二进制表示为

    • 1

      下面是图的拓扑排序的是?(多选)[img src="https://i1.chinesemooc.org/course/formula/201610/eb69927aaf8baae83211ee3fadf836e7.png"] A: 2 8 0 7 1 3 5 6 4 9 10 11 12 B: 2 8 7 0 6 9 11 12 10 1 3 5 4 C: 8 2 7 3 0 6 1 5 4 9 10 11 12 D: 8 2 7 0 6 9 10 11 12 1 3 5 4

    • 2

      已知S盒如下表,若输入为100010,则二进制输出为( ) [br][/br] 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15 1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9 2 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4 3 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14 A: 0110 B: 1001 C: 0100 D: 0101

    • 3

      【阅读理解(选择)/完型填空】基于以下描述回答 1-2 题: 下表是 9 名评委对 10 名学生的毕业设计进行等级评定结果: 评委 A B C D E F G H I J 1 1 2 4 3 9 6 5 8 7 10 2 1 4 2 5 6 7 3 10 8 9 3 1 3 4 5 2 8 9 6 10 7 4 1 3 4 5 2 6 10 8 7 9 5 1 9 2 5 6 3 4 8 10 7 6 1 4 9 2 5 6 7 3 10 8 7 1 3 5 10 2 6 9 7 8 4 8 1 3 5 7 6 4 8 10 2 9 9 1 2 8 4 9 6 3 7 5 10

    • 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}