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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.更有无数嫔妃、太监和宫女死于混乱中。　　她在前人基础上，苦心钻研黄梅戏的演唱技艺，组建戏班，将黄梅采茶小戏，推进成高台大戏，并一路唱到京城。她是清乾隆年间鄂赣皖三省黄梅戏代表人物，也是黄梅戏从民间小戏发展成高台大戏的奠基人，乾隆皇帝曾御赐为“黄梅名伶”，堪称一代宗师。《雪山飞狐》一剧源于闯王李自成亡国后，李麾下四大侍卫后人胡、苗、范、田四家争夺宝藏而来。四家人因误会重重而互相仇杀，祖先积怨，至胡一刀、苗人凤这一代，凤误会父乃刀所杀，欲为父报仇，与刀决一死战。凤兵器被人落毒，刀被凤伤后中毒身亡。刀之子斐长大后又误会父乃凤所杀害，故又找凤为父报仇。恩怨情仇，千丝万缕………,传令下去，在白水峡布置，截杀越国人。Samp4_5, an example program, demonstrates the use of these time and date-related classes, and its runtime interface is shown in Figure 1.Updated December 28