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Creates an object from its specific subclass. Q: How can it be realized? Answer: To create abstract classes derived from factories, that is, specific factories create specific products. Since products are to be created, product abstract classes and specific product classes are naturally needed.Why is it so important to simply divide three categories?一方面，武界出版社太缺稿子了，还有一方面，就是吕文心很看好陈启这个人，他相信陈启肯定还能写出同样优秀的作品，所以才赌一把。他觉得黎章看自己的目光有些意味深长。Third, the application value of BIM technology in designWang Zeduan previously described that the blood-like liquid flowing out of this strange dog after being hit by steel balls produced by anti-infantry mine explosions is also green, Combined with what Zhao Mingkai said now, It can be determined that for this strange dog, Just as blood represents the primary color of human body fluids in red, The primary color of their body fluids is green, And more unified than human beings, After all, the human brain solution is milky white, Unlike blood, However, whether they are blood or brain solution (in fact, I don't know if it is their blood or brain solution, so I used the word "image" to describe them in front. After all, whether they are natural or artificial, they belong to unknown species, but for convenience of description, they are all green.羽儿，问过了吗？桓楚怎么说？范增苍老的声音响起。