2015校内选拔

&nbsp; <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:宋体;color:black;font-size:24pt;">今有</span><span style="font-family:Arial;color:black;font-size:24pt;">7</span><span style="font-family:宋体;color:black;font-size:24pt;">对数字：两个</span><span style="font-family:Arial;color:black;font-size:24pt;">1</span><span style="font-family:宋体;color:black;font-size:24pt;">，两个</span><span style="font-family:Arial;color:black;font-size:24pt;">2</span><span style="font-family:宋体;color:black;font-size:24pt;">，两个</span><span style="font-family:Arial;color:black;font-size:24pt;">3</span><span style="font-family:宋体;color:black;font-size:24pt;">，</span><span style="font-family:Arial;color:black;font-size:24pt;">...</span><span style="font-family:宋体;color:black;font-size:24pt;">两个</span><span style="font-family:Arial;color:black;font-size:24pt;">7</span><span style="font-family:宋体;color:black;font-size:24pt;">，把它们排成一行。</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:宋体;color:black;font-size:24pt;">要求，两个</span><span style="font-family:Arial;color:black;font-size:24pt;">1</span><span style="font-family:宋体;color:black;font-size:24pt;">间有</span><span style="font-family:Arial;color:black;font-size:24pt;">1</span><span style="font-family:宋体;color:black;font-size:24pt;">个其它数字，两个</span><span style="font-family:Arial;color:black;font-size:24pt;">2</span><span style="font-family:宋体;color:black;font-size:24pt;">间有</span><span style="font-family:Arial;color:black;font-size:24pt;">2</span><span style="font-family:宋体;color:black;font-size:24pt;">个其它数字，以此类推，两个</span><span style="font-family:Arial;color:black;font-size:24pt;">7</span><span style="font-family:宋体;color:black;font-size:24pt;">之间有</span><span style="font-family:Arial;color:black;font-size:24pt;">7</span><span style="font-family:宋体;color:black;font-size:24pt;">个其它数字。如下就是一个符合要求的排列：</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:Arial;color:black;font-size:24pt;">17126425374635</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:宋体;color:black;font-size:24pt;">当然，如果把它倒过来，也是符合要求的。</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:宋体;color:black;font-size:24pt;">请你找出另一种符合要求的排列法，并且这个排列法是以</span><span style="font-family:Arial;color:black;font-size:24pt;">74</span><span style="font-family:宋体;color:black;font-size:24pt;">开头的。</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:宋体;color:black;font-size:24pt;">注意：只填写这个</span><span style="font-family:Arial;color:black;font-size:24pt;">14</span><span style="font-family:宋体;color:black;font-size:24pt;">位的整数，不能填写任何多余的内容，比如说明注释等。</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:Arial;color:black;font-size:24pt;">74****4*7*****</span> </div> <div style="text-align:left;margin-left:0.38in;vertical-align:baseline;"> <span style="font-size:24pt;"><span>•</span></span><span style="font-family:Arial;color:black;font-size:24pt;">741*1*4*7*****</span><span style="font-family:Arial;color:black;font-size:24pt;"> </span> </div>