编写程序，将字符串"no pains,no gains."解析成含有4个单词的字符串数组。

The paragraph following the passage will most probably discuss______.

A．examples of successful young men

B．how to build up one's position in society

C．joys and pains of old people

D．what to do when one has problems in life

The main idea of the passage is that______.

A．life is not enjoyable since each age has some pains

B．young men can have the greatest happiness if they work hard

C．childhood is the most enjoyable time in one's life

D．one is the happiest if he can make good use of each age in his life

程序代码.计算机病毒不仅能影响计算机使用,还能自我复制.就像生物病毒一样,它具有自我繁殖、互相传染及激活再生等生物病毒特征.计算机病毒的独特的复制能力,使它们能够快速蔓延,义常常难以根除.它们能把自身附着在各种类型的文件上,当文件被复制或从一个用户传送到一个用户时,它们随文件一起蔓延.杀除计算机病毒的一个有效方法是找出特定计算机病毒的代码特征.对于给定的带有某种病毒的程序代码段集合,通过寻找程序代码段集合中所包含的公共特征,可以快速确定计算机病毒的代码特征.

算法设计:给定带有某种病毒的程序代码段集合,寻找程序代码段集合中每个代码段都包含的最长字符串.

数据输入:由文件input.txt提供输入数据.文件第一行有一个正整数n(1≤n≤100),表示程序代码段集合中代码段数.接下来的n行中,每行是一个程序代码段.每个程序代码段已经转换成由英文大小写字母组成的长度不超过1000的字符串.

结果输出:将找到的程序代码段集合中最长公共字符串输出到文件output.txt中.

文件的第1行输出最长公共字符串的长度.文件的第2行输出最长公共字符串.

The sentence“Sports were his escapes”（Line 2，Paragraph 2）can best mean that __________．

A.sporting activities were the means for him to get fullest happiness by

B.physical exercises were the only way to relieve him of his pains

C.he didn’t want to do more things than sportive activities

D.sports enabled him to Fun away from his hometown