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A) Use simpler object-oriented languages such as Java, C #. GoF's [design pattern] is essentially an object-oriented design pattern. [GoF · 1.1] mentioned that "the choice of programming language is very important, which will affect the starting point of people's understanding of the problem". From the perspective of learning design patterns, Java and C # are easier than C + +. Such as Java interfaces, can more effectively show the intention of design patterns.1938年春，“七七事变”发生六个多月后，日军占领了华北大部，大兵压境中条山，直逼中华腹地的最后一道防线——黄河天险。在黄河古道上，迎亲的队伍遭遇了日军飞机的轰炸，新娘子皇甫贞与乘坐的花轿一同坠入黄河波涛，为了报仇，新郎杨兴邦收留五名川军散兵，得到武器，并约来好友揭竿而起，拉起一支抗日武装。在共产党河东特委书记宋平的指引下，河东抗日游击队迅速发展壮大，除汉奸、端炮楼、炸机场，掩护中共干部和知名民主人士过黄河到延安，成为活跃在黄河岸边，威震四方的一支民间抗日武装，最终，杨兴邦从一个草莽好汉成长为抗日民族英雄。Liz Bonnin presents a controversial and provocative episode of Horizon, investigating how new scientific research is raising hard questions about zoos - the film explores how and why zoos keep animals, and whether they need to change to keep up with modern science or ultimately be consigned to history.Should zoos cull their animals to manage populations? Liz travels to Copenhagen Zoo, who killed a giraffe and fed it to the lions, to witness their culling process first hand. They think it is a natural part of zoo keeping that is often swept under the carpet. Should some animals never be kept in captivity? In a world exclusive, Liz visits SeaWorld in Florida and asks if captivity drove one of their orcas to kill his trainer.But could zoos be the answer to conserving endangered species? Liz examines their record, from helping breed pandas for the wild to efforts to save the rhinos. She meets one of the last surviving northern white rhinos and discovers the future of this species now lies in a multimillion-dollar programme to engineer them from stem cells. Veteran conservation scientist Dr Sarah Bexell tells Liz the science of captive breeding is giving humanity false hope.Expand its popularity and influence in the industry, the region and even the whole country, and expand its market share. Therefore, the Company will step up its self-packaging publicity efforts, actively use various appropriate media and carriers, especially strengthen the construction of the Company's existing website, strengthen communication with other websites, link with each other, refresh in time, increase the number of items and contents, and increase the number of visits to the website.…,黄石公？何许人也？众人面面相觑。相对来说，闽越的姒摇为人更加实在一些，直来直去。是误以为被秦国朝廷和帝王抛弃，被章邯的友军抛弃。