九年级英语全册口头表达专练Unit13WeretryingtosavetheearthB课件新版人教新目标版.ppt

Unit13Weretryingtosavetheearth!B,很多人都听说过鱼翅羹。这道昂贵又著名的菜在中国南方特别流行。,但是每次当你喝鱼翅羹的时候，你是否意识到你杀了一只鲨鱼？,当人们捕捉到鲨鱼的时候，他们切掉鲨鱼的鱼鳍，然后把它们扔回大海。,失去鱼鳍的鲨鱼再也不能在水里游泳，会慢慢死去。这种做法不仅残忍而且对环境有害。,鲨鱼处于海洋生态系统食物链的顶端，如果它们的数量下降得太多，将会给所有的海洋生物带来危险。,很多人以为鲨鱼永远都不会频临灭绝，因为他们是食物链的最强者。,但事实上每年大概有七百万的鲨鱼被捕杀和交易。,在过去的20年到30年，某些品种的鲨鱼数量下降了超过90%。世界各地的环保组织如野生救援协会和世界自然基金会，,都在向公众宣讲有关“猎翅”的行为，他们甚至已经呼吁政府立法停止鱼翅的销售。,到目前为止，没有任何科学研究表明鱼翅对健康有好处，那么为什么要吃它们呢？帮助拯救鲨鱼吧！,Manyhaveheardofsharkfinsoup.ThisfamousandexpensivedishisespeciallypopularinsouthernChina.,Butdoyourealizethatyourekillingawholesharkeachtimeyouenjoyabowlofsharkfinsoup?,Whenpeoplecatchsharks,theycutofftheirfinsandthrowthesharkbackintotheocean.,Thisisnotonlycruel,butalsoharmfultotheenvironment.Withoutafin,asharkcannolongerswimandslowlydies.,Sharksareatthetopofthefoodchainintheoceansecosystem.,Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.,Manybelievethatsharkscanneverbeendangeredbecausetheyarethestrongestintheirfoodchain.,Butinfact,around70millionsharksarecaughtandtradedinthisindustryeveryyear.,Thenumbersofsomekindsofsharkshavefallenbyover90percentinthelast20to30years.,Environmentalprotectiongroupsaroundtheworld,suchasWildAidandtheWWF,areteachingthepublicabout“finning”.,Theyhaveevenaskedgovernmentstodeveloplawstostopthesaleofsharkfins.,Sofar,noscientificstudieshaveshownthatsharkfinsaregoodforhealth,sowhyeatth