_mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

题目内容

纠错

Miguel’s online banking password is nine characters long and includes at least one character of each of five types: digits, punctuation marks, uppercase (capital) letters, lowercase (noncapital) letters, and certain other characters. The password begins or ends with one of these other characters, of which it contains exactly one. No consecutive characters in the password are of the same one of these types. (For example, no capital letter is preceded or followed by another capital letter.) The password contains more lowercase letters than characters of any one of the other four types. It also contains fewer punctuation marks than digits, lowercase letters, or uppercase letters. The first three characters of the password are M, ?, and G.In the table, select a type of character that the fifth character in the password must be and a type of character that the seventh character must be. Make only two selections, one in each column.

Fifth character	Seventh character
Digit	Digit	Digit
Lowercase letter	Lowercase letter	Lowercase letter
Punctuation mark	Punctuation mark	Punctuation mark
Uppercase letter	Uppercase letter	Uppercase letter
Other character	Other character	Other character

正确答案： 1,1

参考解析

提交我的解析

知识点概述
主要涉及逻辑推理中的条件推理和限制条件应用，根据给定的密码字符类型、数量及排列规则等条件，推理出特定位置的字符类型。解析
已知密码9位，有5种字符类型且各至少1个，“其他字符”仅1个且在开头或结尾，无连续相同类型字符，小写字母最多，标点符号比数字、小写字母、大写字母少，前3个字符是M, ?, G。 - 因为前3个已包含大写字母（M、G）和标点符号（?），且“其他字符”在开头或结尾，所以第5个字符不能是大写字母、标点符号、其他字符。又因为小写字母最多，所以第5个字符是小写字母。 - 第7个字符同理，不能是已在前面相邻位置出现过的大写字母、标点符号，“其他字符”位置固定不在此，且要满足字符类型分布规则，所以第7个字符是数字。综上，第五个字符选Lowercase letter，第七个字符选Digit。

题目讨论 (如果对题目有任何的疑惑，欢迎在这里提出来，大家会帮你解答的哦~)

还没有人评论,赶快抢个沙发~

做题笔记

参考解析

题目讨论 (如果对题目有任何的疑惑，欢迎在这里提出来，大家会帮你解答的哦~)

请选择错误类型：

请描述一下这个错误：