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Day, no zero display, 1-31It can be traced back to thousands of years BC, and wrestling has been recorded in ancient civilizations of Japan, China, Greece, Egypt and other countries. Only for men.翘儿也冷静了一些，拿起工具，痴痴望向对岸。The network cable is the transmission medium. A computer can correspond to multiple IP addresses. In fact, the network card interface of a computer corresponds to one IP address. If the computer has two network cards, then the computer can have two IP addresses!土地肥沃，是重要的产粮基地。The core idea is: when the state of the object changes, it changes its behavior at the same time, which is very understandable! Take QQ for example. There are several states, online, invisible, busy, etc. Each state corresponds to different operations, and your friends can also see your state. Therefore, the state mode is two points: 1. You can obtain different behaviors by changing the state. 2. Your friends can see your changes at the same time. Look at the picture:The most important and direct way to distinguish is to look at the lines on the body.