• 2022-06-07
    把下列中缀表达式转化为相应的后缀和前缀表达式。[tex=8.5x1.357]2Ikc7poZqm9e5OoEko5HlO4T7hB3InqfKfA95uxLCA6cNA3Es15UggubbLbRCicQDhO8Ziy4vTIUCQCMChJXBEaiO1tXeE9nDQq1UY4+4Mk=[/tex]
  • [tex=13.571x12.143]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[/tex]

    举一反三

    内容

    • 0

      【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

    • 1

      中缀表达式23+((12*3-2)/4+34*5/7)+108/9对应的后缀表达式为( )。 A: 23 12 + 3 * 2 – 4 / 34 5 * 7 / + 108 9 / + B: 23 12 3 * 2 4 – / 34 5 * 7 / + + 108 9 / + C: 23 12 3 * 2 – 4 / 34 5 * 7 / + 108 9 / + + D: 23 12 3 * 2 – 4 / 34 5 * 7 / + + 108 9 / +

    • 2

      编写程序,输出下列的数字图形。 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 1 2 3 4 5 6 1 2 3 4 5 1 2 3 4 1 2 3 1 2 1

    • 3

      已知a=[1 2 3; 4 5 6; 7 8 9],执行命令:a([3,1],:)=a([1,3],:),a将变为( )。 A: [4 5 6;4 5 6;4 5 6] B: [7 8 9;4 5 6;1 2 3] C: [2 2 2;5 5 5;8 8 8] D: [3 2 1;6 5 4;9 8 7]

    • 4

      写出以下表达式的结果,结果之间间隔一个空格: 6 + 5 / 4 - 2 2 + 2 * (2 * 2 - 2) % 2 / 3 10 + 9 * ((8 + 7) % 6) + 5 * 4 % 3 * 2 + 3 1 + 2 + (3 + 4) * ((5 * 6 % 7 / 8) - 9) * 10