见儿子看向站在一旁的秦淼，忙把碗递给她，淼淼，你来喂，我还要看看青莲去。
Advantages: Adding a new operation is easy, because adding a new operation means adding a new visitor, and the visitor pattern centralizes the relevant behaviors into a visitor object.
2.2
Unicom
真人真事改编，讲述Fa在遭遇家庭暴力与渣男分手后来到曼谷，开始她全新的生活，在这里，她结识了新的朋友，并认识了一个特别的女人…
出城后，玉米静静地仰浮在水面。
想起他们在青山书院时的生活，不禁有些仲怔。
In other words, their daily income is 50 rupees. In fact, as long as the hawker does not spend all the 50 rupees, he saves 5 rupees a day for the next day's purchase. Due to the compound interest effect, they only need 50 days, so they don't have to borrow the 1,000 rupees.
The civil aviation pilots that the main question wants to ask should refer to 121 pilots, not to the civil aviation pilots including 91 navigable and 135 business planes in general. Then let's briefly talk about the skills and conditions here.
D > B enters the synchronized block, and since instance is not null at this time, it immediately leaves the synchronized block and returns the result to the program calling the method. E > At this point, thread B intends to use the Singleton instance, only to find that it has not been initialized, so an error occurs. Therefore, there is still the possibility of errors in the program. In fact, the running process of the program is very complicated. From this, we can see that it is more difficult and challenging to write programs especially in multi-threaded environment. We further optimized the program:
李抒出身于铁路世家，父亲是老巡道工，母亲是老列车员，她继承父母对铁路的挚爱，大学毕业后当上了列车员。上车第一天她就遇到意外事件，农村来的长山夫妇把给孩子治病的钱不慎失落到列车厕所窗外，情急之下，李抒擅自下车去找钱，因严重违纪受到处分。但李抒没有因此而消沉，她在段长欧阳的鼓励和帮助下勇敢地站了起来，又回到了她日思夜想的列车上。一个天高云淡的早晨，李抒挽着欧阳的臂膀向远方眺望，两条笔直、远向天际的铁轨在他们眼前延伸，这长长的铁轨不仅乘载着李抒和她的工友们魂牵梦绕的事业，也乘载着他们绚丽多姿的人生。
瑄瑄还是离开了台北，阿磊却与她失去了联系。日夜想念瑄瑄的同时，阿磊也决定到三义，去发掘瑄瑄的秘密…
-Execution method by delegate
Taking into account the error, and based on the small power storage ratio, we can correct this value to 15% and 20% multiplication damage.
"The first few hours of the battle were the same as before, We use all kinds of weapons in our hands in our positions. Strike the attacking Vietnamese troops, The exchange of fire was very intense, The front of the position was covered with the bodies of the Vietnamese army. We also have a lot of wounded on our side, However, after all, it is based on strong fortifications. More wounds, less deaths, In particular, the wounded are mainly minor, All of them can continue to fight without getting off the line of fire. At that time, my monitor was quite happy. If you play like this, There's not much pressure to hold position 149, The Vietnamese army that could fight could not even get close 400 meters away from the front of the position, As a result, it was only over an hour after he said this. I remember it was one or two o'clock in the afternoon. Something is wrong, The left and right wings of the position, It's two sparse rain forests, The positive was the same, But before the war, in order to facilitate the offensive forces to assault, All of them have been cut down by Vietnamese troops, But it also broadens our horizons, However, it is still unclear what is going on in the rainforest on both sides. Just when something was wrong, First I heard a "buzzing" sound inside, At first it was a little bit, Later it grew bigger and bigger, At last it was so big that it could almost cover the shot when it was fired. No one in our position knows what's going on, All of them stretched out their heads and looked in the direction of the sound. When the "buzzing" sound reached its peak, they saw that a large area of flying insects flew vertically from the rainforest on both wings. If the number were small, whether the sound or flying insects could not be heard or seen at this distance, but now they could hear clearly.
韩杰和钟子健是一对同父异母的兄弟。二十年后，父亲遭不法商人白伟德的陷害离开人世，大学毕业的钟子键刚刚踏上社会就跌入人生低谷。就在钟子健走投无路之际，意外的结识了文化局干部周而复，子健的正直、倔强和勇气深深地吸引着他，两人不打不相识成为好友，在周而复的推荐下，子健进入了文化局，成了一名稽查大队的队员。而此时哥哥韩杰进入了当地最大的音像公司工作，而这家公司的老板正是白伟德。因不满哥哥与敌为友的行径，钟子键对韩杰不理不睬。其实钟子键并不知道韩杰的真实身份是国家派出的一名特别调查员，其目的是进入白伟德公司的内部，获取他从事盗版的证据。在白伟德的公司，韩杰认识了曹桦，在共同的进退中，曹桦敢爱敢恨敢打敢拼的性格深深地吸引着韩杰，曹桦也倔强地爱上了韩杰。经过万般曲折，在兄弟俩的共同努力下白伟德最终被送上了法庭。
事业处于低谷期的志雄（刘烨 饰）意外遭遇初恋女友（高圆圆 饰），曾经的美好与重获的激情让志雄决定和结婚七年的妻子（李小冉 饰）离婚；女儿车祸中丧生，妻子（张延 饰）重病在床，自己又丢了工作，王遥似乎走到了人生的绝境，此时一个带给他希望的女人（林心如 饰）神奇的出现，这个女人用拥抱给予他继续生活的希望，然而王遥最终发现，给予希望的拥抱只是一个温柔的陷阱；里加（黄轩 饰）是一个放荡不羁的年轻人，他喜欢在狂飙的赛车上和短暂的一夜情中寻找刺激，然而，聋哑少女李欣（王珞丹 饰）的出现让他最终懂得爱的真谛……
For the convenience of the experiment, we directly use the functions in libc.so.6 as the attack functions to be executed. This is a C program runtime in Linux, which holds a large number of available functions and contains system ("/bin/sh"). Therefore, we can use ROPgadget tool to obtain the code fragments that we can exploit, and use pwntool to exploit the vulnerabilities of vulnerable programs, thus achieving our attack purpose, that is, running system ("/bin/sh"). In order to facilitate the subsequent use of ROPgadget tool to find gadget and attack, it is necessary to copy the libc.so.6 file to the operation directory. First, use the "ldd" command to view the source directory, and then use the "cp" command to copy it to the operation directory.
