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（二）业务之间具有明显的主附关系。主要业务居于主体地位，体现交易的实质和目的；附属业务是主要业务的必要补充，并以主要业务的发生为前提。
，这一点在搜狗输入法下载中也有详细论述
No base class to extend, no abstract methods to implement, no controller to coordinate with. Just an object with the right shape.
If you purchase the Venusaur, Charizard, and Blastoise set before March 3, you'll get the Kanto Region Badge Collection as a free gift with purchase (while supplies last). Coming in at 312 pieces and recommended for ages 18 and up, this buildable case houses all eight Pokémon Kanto region badges from the first generation of games.
1. 不管是互换、购买还是免费领福卡，只要有人要手机校验码、银行卡信息、支付密码，一律拒绝。