在坐标原点处有一波源，其振动表达式为[tex=5.571x1.214]sgY0TEdpYSixpx9svp4wH5iKTnk5W7/i84d3ZH10SrM=[/tex]，由波源发出的平面简谐波沿坐标轴[tex=0.571x0.786]c5VsltFnl9nO0qB/vNKOWA==[/tex]正方向传播。在距离波源[tex=0.571x1.0]TcM6B5Wrs5vy9dWrxRPSdg==[/tex]处有一平面将波反射（反射时无半波损失），如图，则反射波的表达式为[img=224x125]17d938e43353731.png[/img]
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举一反三
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- 表示x是5的倍数或是9的倍数的逻辑表达式为 ____。 A: x \ 5 = 0 Or x \ 9 = 0 B: x \ 5 = 0 And x \ 9 = 0 C: x Mod 5 = 0 Or x Mod 9 = 0 D: x Mod 5 = 0 And x Mod 9 = 0
- 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}
- 以下程序段实现的输出是（）。for(i=0;i<;=9;i++)s[i]=i;for(i=9;i>;=0;i--)printf("%2d",s[i]);[/i][/i] A: 9 7 5 3 1 B: 1 3 5 7 9 C: 9 8 7 6 5 4 3 2 1 0 D: 0 1 2 3 4 5 6 7 8 9
- 在坐标原点处有一波源，其振动表达式为[tex=5.571x1.214]sgY0TEdpYSixpx9svp4wH5iKTnk5W7/i84d3ZH10SrM=[/tex]，由波源发出的平面简谐波沿坐标轴[tex=0.571x0.786]c5VsltFnl9nO0qB/vNKOWA==[/tex]正方向传播。在距离波源[tex=0.571x1.0]TcM6B5Wrs5vy9dWrxRPSdg==[/tex]处有一平面将波反射（反射时无半波损失），如图，则反射波的表达式为[img=224x125]17d938e43353731.png[/img] 未知类型：{'options': ['[tex=9.643x2.214]9CV53s0x0n4/19lkpBr5FDCYU5uu0pN2vyneEZwcdKgZY/V5cWbyGpcSNNp4Pmc2Y5945Zc22APjGQR2/AnZzFloDbcoGvnk90oJEZPM0GE=[/tex]', '[tex=11.357x2.786]9CV53s0x0n4/19lkpBr5FDCYU5uu0pN2vyneEZwcdKhz9GlW2ocPlCKXULUR5AjvyykwnTxw3BsfuaDAIq0NMz3nPqvVZYzZqCsN3HcT4Es=[/tex]', '[tex=11.857x2.786]9CV53s0x0n4/19lkpBr5FDCYU5uu0pN2vyneEZwcdKgSKIi2PqomOsgXNQngKAywTi8mIjj/WNqq3DeBABOwss9ir5GFa9A+GiZ9KBxf9Yg=[/tex]', '[tex=11.357x2.786]9CV53s0x0n4/19lkpBr5FDCYU5uu0pN2vyneEZwcdKgRb01baO28h5FGGuGxYvDS60KOCsK/9hcoKj6CDqYdU/FH3Bd6brX5gxphJIraU58=[/tex]', '[tex=11.857x2.786]9CV53s0x0n4/19lkpBr5FDCYU5uu0pN2vyneEZwcdKh1FRz5TQQ14vCfUoAIsjuLvDy5r9FE7YcZlHbIXxA+zTMNUx8+Vq+lMbxTQbVbcJQ=[/tex]'], 'type': 102}