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6. Understand that communication between modulesLiz 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.书生真的不知如何是好了，他跟小孩子接触不多，愣是不知玉米是什么心思。Special thanks to Sister Jian Ping for providing us with the opportunity to experience this. After studying in these days, we have gained a lot. It is also time for us to sum up.独立干练的女白领何大叶被扣上了“大龄剩女”的帽子，尽管面临催婚压力，但是她依旧没把婚姻当“人生大事”看待。她选择追求事业上的成功，认为女人靠自己比倚靠婚姻和男人更靠谱。其实，三年前何大叶曾与飞行员男友罗畅牵手走过婚礼红毯，不料婚礼上罗畅却突然拉着大叶一起逃婚，事后罗畅坦言自己没有做好结婚和承担责任的准备。大叶原谅了他，两人和平分手。离婚后的何大叶，与前夫保持友好往来，生活中互相照应，尽管都对彼此心存幻想，但始终没有更近一步。后来，大叶与过气男模张猛不打不相识，尽管张猛遭遇事业和生活的瓶颈，但是他有责任有担当安全感爆棚，感受到爱意的何大叶既享受又纠结。最终，在张猛的理解和爱护下，大叶卸下防备，坦然面对这份感情，两人走到了一起。二舅奶奶住在眼跟前，一年到头，吃的鱼、肉、鸡鸭、蛋，连青菜木耳竹笋那些，都不用花一分银子。