数字排列问题!1234567890组成四位数字0可以在首位排列出所有组合能列出...答:没有那么多,10*9*8*7=5040个。字数超出最大允许值,请删减!后面省略若干0123,0124,0125,0126,0127,0128,0129,0132,0134,0135,0136,0137,0138,0139,0142,0143,0145,0146,0147,0148,0149,0152,0153,0154,0156,0157,0158,0159,0162,0163,0164,0165,0167,0168,0169,0172,0173,0174,0175,0176,0178,0179,0182,...