Is to define a main method calculate in the AbstractCalculator class, calculate () calls spilt (), etc. Plus and Minus inherit the AbstractCalculator class respectively, and implement the call to subclasses through the call to AbstractCalculator, see the following example:
"I am from Beijing, Ancestors raised dogs for the imperial court, The dog was not the pet of the nobles, Even royalty racing dogs, One by one, They are very expensive, In terms of seniority, it is a matter for my great grandfather's generation to move forward. Therefore, the family has inherited dogs from generation to generation, I have also saved up a lot of ancient books and materials in this field, Some of them were found and burned in the period of breaking the Fourth Old Age. Also because this was criticized during the Cultural Revolution, But it doesn't matter, The key is that I can look at dogs. I have been growing up in this environment, so I have had special feelings for dogs since I was a child. You see, unless I have to use it, for example, now, otherwise I never say the word "dog" but only "dog", because this is a kind of respect for dogs. This is like describing that it is normal for people to talk about "a", that is, to talk about "only" or "bar", that is to swear.
If he asks different questions every time, perhaps his understanding of English has made little progress or even no progress at all.
Beijing
朋友？钟隐心里嘀咕一句，看来这关系匪浅啊，没错了。
不是想发财，等情势紧张的时候，抛出来也能救急，也算做善事。
这二者之间，天壤之别，岂可相提并论。
影片剧本来自宙比·哈罗德，该剧本基本忠实于托马斯·马洛礼15世纪的文学作品《亚瑟王之死》，剧情颠覆传统，一路探索亚瑟从市井到王座的征途。亚瑟的父亲在他小时候就惨遭杀害，亚瑟的叔叔伏提庚篡取王位，剥夺了亚瑟的天赐之权。他浑然不知自己的身世，在城市的穷街陋巷里摸爬滚打着长大，但当他拔出石中剑，他的人生就彻底地天翻地覆了，亚瑟不得不接受自己真正的使命。
When launching reflection attacks, a large number of reflectors need to be found on the Internet. Some kinds of reflection attacks are not difficult to implement, such as ACK reflection. It is only necessary to find the developed TCP port on the Internet, and this kind of server is very extensive on the Internet.
影片围绕朱莉娅·西姆斯，因为残酷的创伤而落入一种非常规的治疗来恢复自己。
致力于制作最接地气学生搞笑视频节目，代表作品《学校里的疯子》
哎呀，我睡觉睡糊涂了，竟把这茬得忘了。
毛小慧（郑裕玲）乃典型城中事业女性，美丽聪明，自视甚高，努力工作之余，感情上落得一片空白，每天暗地期盼真命天子的出现。一天旅行归来，公司起了翻天覆地的变化，老板竟安排了一个放浪不文、恶名远播的古惑师爷余乐天（黄子华）担任慧的助手，令慧苦不堪言，啼笑皆非。
军统头目戴笠的座机意外失事，一份绝密计划曝光天下：戴笠揣摩上意，秘密雇佣日本杀手宫十一，刺杀拥护和平支持共产党的四川大豪徐德庸。消息一出，举国哗然，各方势力涌动。军统亡羊补牢，调派军统元老林家山追杀宫十一、保护徐德庸。中共方面也派出了精干的保卫专家老吴，警卫员彭克虎因枪法极准作为老吴的保卫一同来到了重庆。徐德庸府邸内外连续发生刺杀事件，老吴也惨遭杀害，宫十一不听军统指挥坚决执行计划，形势失控。彭克虎与林家山联手破坏了宫十一毁灭性计划，但却仍没有阻止宫十一的刺杀脚步。彭克虎与林家山发现日本刺客的行为不仅仅是刺杀徐德庸那么简单，最终的暗杀计划慢慢浮出水面。
尹旭轻轻点点头，嬴诗曼已经去了，至少不会出什么意外，稍稍放心一点。
不过这部续集可能不会在电影院上映，因为负责该片发行的是索尼家庭娱乐公司。换言之，这很可能是一部直接推出影碟的续集。
五岁的星星（陈品嫙饰）有个跟别人不一样的妈妈小青（姚爱寗饰），爱笑的小青最喜欢跟星星一起玩耍，相依为命的两人总在一声声的「谢谢」与「对不起」中寻求大家的认同与谅解。小青为了生活，带着星星到市场打工，却无意惹祸上身，开启了一连串的麻烦事，甚至丢了工作，还引起新闻媒体的注意，爆出小青不堪的过往…… 在社会舆论的压力下，社会局决定安排星星到寄养家庭，然而这个表面上「最好的安排」，竟成了小青母女俩「最坏的决定」。面对现实的压迫与社会的歧视，小青决心带着星星离开，但他们究竟该何去何从呢？
杨紫琪发现前男友的出轨后果断分手，她独自在酒吧买醉却错过了房东电话。回到家后杨紫琪一头栽到徐云恕的身上。杨紫琪第二天清醒之后非常尴尬，打算通过各种方法赶走徐云恕。前男友找到杨紫琪要求复合，并死皮赖脸的闯进房子里想要强吻杨紫琪，徐云恕出现将杨紫琪救下。杨紫琪向徐云恕袒露自己的心事，两人矛盾化解。之后的一段日子，杨紫琪拿下有色眼镜之后，发现徐云恕人还不错，接受了徐云恕住进自己房子的事实。杨紫琪母亲对女儿的婚事非常着急，便来到杨紫琪的城市突击检查，杨紫琪拉来徐云恕当做挡箭牌。杨母走后，徐云恕却希望能够将假戏真做，向杨紫琪表白。徐云恕恋爱经验为零，用各种拙劣的方法，希望能够讨得杨紫琪欢心，终于将杨紫琪感动。徐云恕恋爱的消息被徐家得知，徐家禁止徐云恕继续与杨紫琪交往，徐云恕与家里再次发生冲突。徐云恕的银行卡被冻结，杨紫琪也丢掉了工作。两人都没有了经济来源，徐家还阻碍了两人找工作。杨紫琪身上背负了很多的压力，甚至一度让徐云恕选择回归徐家，但在徐云恕的鼓励下，杨紫琪最终坚定了决心，与徐云恕共同面对，并最终突破重重困难终成眷侣。
The command in the above figure does not use the-t option to specify the filter table. We have been saying that when the-t option is not used to specify the table, it means the default operation filter table.
