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Before learning Reactor mode, we need to briefly introduce "four models of I/O" and "what is I/O multiplexing", because Reactor is a mode that uses synchronous non-blocking I/O multiplexing mechanism.英布突围成功了，他最有可能去哪里？荥阳？不错。1. Breeding crayfish, First of all, we must find a good venue. Ponds or paddy fields can be transformed. Attention should be paid to the fact that it is best not to have farmland water flowing into the ponds around, because pesticides must be applied to grow rice now, and if pesticides flow into your ponds, your shrimps will die a lot. If they die, they will generally sink to the bottom of the water, and you cannot find them. Therefore, attention should be paid to the selection and pulling. Water sources should be guaranteed and water should be exchanged for drainage and irrigation.[Tian Zi]: I define it as increasing the overall damage, that is, adding an additional multiplier to the total damage.北京的牢笼与远方的子孙给了她双重的折磨，郁郁之中，面上已经生出了皱纹，沉默寡言。DNS NXDOMAIN Flood郑氏轻声问道：小葱，可有啥事？小葱犹豫了一下，呐呐地说道：没啥。