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Is to create a factory class to create instances of some classes that implement the same interface. First, look at the following diagram:(2) A ship towed by side shall display one tail light and two side lights at the front."I deserve to be poor." The rich man stamped away. Mullenathan said: "Poor people who have been in a state of scarcity for a long time will consume a lot of bandwidth by the scarcity mentality, and there will be very few mental resources for self-control, so they will easily become very impulsive."Attackers can use small packets (64 bytes) and large packets (more than 1500 bytes) to attack.The gangster said to the crew locked in the cabin, Now that the ship has docked, we will let you go, but blindfolded for fear of being recognized later. After that, they blindfolded the crew, tied them up, and took turns to escort them to the cabin deck one by one. The first person to be taken up was the experienced captain. As soon as he was taken up the deck, he felt that this was not the shore. Knowing that he was going to be killed, he begged these gangsters not to kill him.Define a bridge that holds an instance of Sourceable:Parameters are transferred to the constructor to judge whether there are available events in the event pool, some are reused, and no new ones are created.