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? Generally speaking, the factory mode is suitable: whenever a large number of products need to be created and have a common interface, they can be created through the factory method mode. Of the above three modes, the first cannot create the object correctly if the incoming string is wrong, and the third does not need to instantiate the chemical factory class compared with the second, so in most cases, we will choose the third-static factory method mode. ?CW预订的军事+阴谋惊悚剧《勇者 Valor》由Kyle Jarrow执笔，剧中地点设定在一个美国陆军基地，这处有一群精英直升机机师，受训进行各种秘密的国内外住务；在这军事纪律和人类欲望之间界线被考验的基地，故事会分为现在线及闪回，闪回是有关部队中首位女机师涉及的失败任 务，然后揭露个人﹑政府﹑军队之间的秘密，最后整季的主线是拯救一组失踪的士兵。胡钧恨得心似油煎，恨不得把胡镇这个祸害抓来一刀剁了。章邯在迅速平定西楚国故地之后，立即率领八万军队来到定陶。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.时装表演踏入尾声，观众掌声雷动，著名时装设计师尤力(谢君豪)出场，带着自己的灵感女神兼女友，著名模特儿潘宝玲(吴美珩)向观众鞠躬致谢。华丽缤纷的天桥加上聚光灯的焦点，令时装界悦目得叫人神往。爱丽丝脸上洋溢出灿烂笑容，递出手里的书。