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The singleton mode is characterized by two classes (one business class construction method is private, and the other factory class is responsible for saving singletons of business classes. Pay attention to the use of multithreading)2. Investment Loan Contract《龙门镖局》以一起劫镖事件开始，镖局少奶奶盛秋月濒临破产，爱占便宜的平安票号少东家陆三金收购镖局之后，才发现这是个烂摊子，想撤退时已经骑虎难下。随后，不会武功的镖师白敬祺、一心嫁入豪门的名医邱璎珞、武功盖世的官二代吕青橙、爱财如命的厨子蔡八斗、前女友遍天下的老镖头恭叔加入战团，冲突不断。Today, the two female reporters of the NPC and CPPCC took the screen by surprise, which is really a long story. However, in recent years, in order to gain the opportunity to interview the NPC and CPPCC, female journalists have indeed emerged one after another in robbing news.Italy: 650,000该剧是2016年日剧《卖房子的女人》的续集，讲述天才不动产从业者三轩家万智顺利地把合适的房子卖给顾客的故事。It is easy to see that OvR only needs to train N classifiers, while OvO needs to train N (N-1)/2 classifiers, so the storage overhead and test time overhead of OvO are usually larger than OvR. However, in training, each classifier of OVR uses all training samples, while each classifier of OVO only uses samples of two classes. Therefore, when there are many classes, the training time cost of OVO is usually smaller than that of OVR. As for the prediction performance, it depends on the specific data distribution, which is similar in most cases.