save-the-sharks!拯救鲨鱼-(导入)(课堂PPT).ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,panda,1,golden monkey,2,dolphin,3,shark,4,“海中狼”。还有鲸鲨，大白鲨。,目前因为有大多数人认为鲨鱼的软骨（即鱼翅）中蛋白质很高，但这是错误的。鸡蛋的蛋白质远远超过鱼翅。因为人类错误的观念，鲨鱼几十年来被大量猎杀，专家分析再这样下去，鲨鱼将绝种，请保护好鲨鱼。吃鱼翅是可以的，但也对人体有害，因为鲨鱼翅中含有一定量的神经毒素。,鲨鱼，生活在海洋中，是海洋中最凶猛的鱼类。,鲨鱼早在恐龙出现前三亿年前就已经存在地球上，至今已超过五亿年，它们在近一亿年来几乎没有改变。鲨鱼，在古代叫作鲛、鲛鲨、沙鱼，是海洋中的庞然大物，所以号称,5,the,food chain,in,oceans,ecosystem,6,Sharks are,at the top of,the,food chain,.,7,hear of,cut off,hear from,no longer,be harmful to,bring danger to,the number of,so far,不再,割掉；砍掉,收到来信,的数量,对有害,听说,给带来危险,目前,8,Some people like to eat sharks fin soup,especially in_ China.But getting the sharks fin is very _.When people catch sharks,they_ _ their fins and throw the sharks back into the ocean.The shark slowly dies because it cant _without a fin.And it is also_ to the environment.Sharks are at the_ of the food _.If the number of sharks drops too slow,it will break the balance of the nature.Please say no to eating shark fin soup,and take action to save the sharks！,9,