重大版选修.pptx

One mans meat is another mans poison.Something that one person likes may be distasteful to someone else.ExamplesJill:I dont understand why Don doesnt like to read science fiction.Its the most interesting thing to read.Jane:One mans meat is another mans poison.I wouldnt want to do her job,but she seems to love it.Oh well,one mans meat is another mans poison.Do you think frogs are useful or harmful animals?In what way?discuss with your partner.Try to give some examples to support your ideas.discussionYou may begin like this:1.In my opinion,frogs are useful animals,because2.As far as Im concerned,frogs are harmful animals3.We cant simply say frogs are useful or harmful4.Generally speaking,5.Pest 害虫害虫 beneficial insects 益虫益虫 crops 庄稼庄稼We cannot simply say frogs are useful or harmful because every coin has two sides.The advantages of frogs are that they can eat harmful insects and be protective of the crops,and some parts of them are medicine materials;on the other hand,some of them are poisonous to human beings and sometimes they are kind of noisy.Suggested answer:Read the article carefully to complete the following chart.Team 2Team 1Team workThe Coqui FrogsFeaturesThe coqui is a and frog about long.It hides in areas during the day and moves at night.The call of a male coqui sounds like .Where,when andhowThe coqui frogs are originally from _ and _.They arrived in _ about ago.They were brought in accidentally in _ of plants.tinybrown5 centimeterswet protectedonto trees to feed,or to call to femalesKo-Kee!Puerto RicoFloridaHawaii10 yearsshipmentsLets check the work of Team 1The Coqui FrogsCurrent situationTheir numbers have sharply _ and they have quickly _ around the Hawaiian Islands.Threat toenviron-mentThey eat every night.They are affecting in Hawaii.The loud calls of the frogs make it difficult at night.They have no natural enemies to reduce .Efforts to stoptheir spreadIn Hawaii,it is a crime to ,_ or .The Department of Agriculture is trying to find an .For now,the frogs may only be caught .increasedspreadthousands of insectsthe tourism industryto sleeptheir population sizetransportsellset the frogs freeeffective chemicalby handLets check the work of Team 2A tiny frog with a sharp noise has invaded the Big Island and wont shut up.Associated PressThe coqui frog population has been increasing in Hawaii since 1988,but just recently exploded.Department of Agriculture,HawaiiWhat does the Big Islandrefer to?predictionThe Coqui in Hawaii is useful or harmful?how do you know?A sharp noiseShut upexplodedHawaii