• 2022-06-01
    下列语句分别是不同程序中的第一个输入/输出语句,若去掉其中的“<<left”,则输出效果将发生变化的是
    A: eout<<left<<setfill('*')<<357;
    B: cout<<left<<setw(5)<<357;
    C: eout<<left<<setw(5)<<"ABCDE";
    D: eout<<left<<"ABCDE";
  • B

    内容

    • 0

      已知一程序运行后执行的第一个输出操作是______。 cout<<setw(10)<<setfill("*")<<1234; 则此操作的输出结果是 A: 1234 B: ******1234 C: **********1234 D: 1234******

    • 1

      The museum is __________. A: in your left B: in the left C: on your left D: at the left

    • 2

      In "Left Behind", what is the order the author organized her passage? A: Things left behind→memories left behind→love left behind B: Memories left behind→things left behind→love left behind C: Love left behind→memories left behind→things left behind D: Love left behind→things left behind→memories left behind

    • 3

      设`\n`阶方阵`\A`经过初等变换后得方阵`\B`,则 ( ) A: \[\left| {\rm{A}} \right| = \left| {\rm{B}} \right|\] B: \[\left| A \right| \ne \left| B \right|\] C: \[\left| A \right|\left| B \right| \ge {\rm{0}}\] D: 若`\| A| = 0`,则`\| B| = 0`

    • 4

      若\({y_1}\left( x \right), {y_2}\left( x \right)\)都是\(y' + P\left( x \right)y = Q\left( x \right)\)的特解,且 \({y_1}\left( x \right), {y_2}\left( x \right)\) 线性无关,则通解可表为\(y\left( x \right) = {y_1}\left( x \right) + C\left&#91; { { y_1}\left( x \right) - {y_2}\left( x \right)} \right&#93;\)。