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"Because I have heard some scout comrades who came down from the enemy's rear say before, The Vietnamese army has the habit of dogs biting people. They just take advantage of the dog's low stature, The advantage of fast moving speed, Avoid fire, Then they rushed to the position with explosives and died with us. There is also the gunner who rushed up with the dog and bit us. Good jamming the gunner's shot, Buy time for their attack, I heard that they learned this tactic from Mao Zi. I don't know exactly what is going on. Anyway, that kind of "dog" is fantastic, with a large number and fast speed. It is difficult to hit all kinds of light and heavy firepower on hand. The closer they get to the position, the more they will take some simple evasive actions, which cannot be prevented.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.穷困萧索的十八里坡问口村，在毫无征兆的日子里迎来了死神的降临。农民赵长禄和祁有顺偶然在河滩石头堆中挖出一个密封的盒子，本以为是什么金银财宝，谁知不过是两个装满臭水的玻璃瓶。此后不久，二人接连猝死，容颜恐怖，令人不寒而栗。在此期间，支书家也发生牲畜大规模死亡的事件。消息传到市里，引起政府和公安机关的高度重视，可是为了某种完全不必要的原因，相关部门封锁疫情。同时为了防止疫情进一步蔓延，派出了军队封锁十八力坡。二人正要告退，马尼拉官吏正巧来访，说是马老九找到去美洲的人了。香荽忙往他跟前凑近些。刘主任决定用新招，她经村上同意把这事放到了网上去，一连几天没反应。 正巧市爱心社区志愿服务指导中心的程渝、胡希夫妇在网上看到消息，他们感概之余辗转联系到了刘主任，一路奔波见到了祖孙三人……4. Charm 4: 101-3000.