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1、根据本节教材用实验和猜测相结合的方法来说明生命起源的特点,教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。英语3分钟简单的演讲稿 演讲稿也叫演讲词,它是在较为隆重的仪式上和某些公众场合发表的讲话文稿。英语3分钟简单的演讲稿,我们来看看。 英语3分钟简单的演讲稿1 SmokingAndHealth Todaysmokingisawidespreadhabitaliovertheworld.Notonlytheold,theyouth,butalsomiddleschoolstudentshavebeenengagedinsmoking.Manyof
2、themthinkthatsmokingisasmartsymbol. However,smokingisharmfultoone’s,health.Itcontributesalotoflungcancer,fromwhichmanypeoplehavediedinthepastyears.Itcanalsocausemanyotherdiseases.Inaword,ifyousmoke,youdohaveamuchgreaterchanceoflosingyourhealth.furthermore,scientificresearchshowsthatsmoki
3、ngisnotonlyharmfultosmokersthemselves,butalsoathreattopublichealth,especiallytowomenandchildren.Therefore,manycountrieshavemadelawsforbiddingsmokerstosmokempublicplacessuchascinemas,stations,hospitals,andsoonGiveupsmoking!意大利医生雷地证明腐肉不能生蛆的实验投影片,巴思德的“鹅颈瓶实验”投影片,原始地球的投影片,米勒实验的投影片。根据本节教材用实验和猜测
4、相结合的方法来说明生命起源的特点,教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。Ifyoudon’tsmoke,don’tstart.Giveupsmokingforthesakeofyourhealth,forthesakeofyourfamily,andforthesakeofthewholeworld. 英语3分钟简单的演讲稿2 Schoolmates: Whenyoulookthelovableanimatedcartoon,playsisinastewhuman'scomputergames,ridesthefasttrain,isan
5、sweringtransoceanictelephonetime,......Notonlyyourmightoncerealizethesciencethestrength,thesciencechangedthisworld,alsochangedourlife,thesciencesideus.Opensforthe20thcenturythegrandchapters,notonlywediscoveredthehumanitytoexperiencethebloodandthefirebaptisminthesehundredyears,hascreatedth
6、einnumerablescientificmiracles.19thcenturyfrancefamoussciencefictionwriteroffictionvernefictionalizing,atthattimeletthehumanbeinconceivable,hefantasizedmoonlandingtravel,theairplane,thelong-rangegunandsoon,all11becametherealityinthe20thcentury.Inthe21stcenturytoday,thehightechisubiquitous
7、. Ascross-centuryonegeneration,howposture意大利医生雷地证明腐肉不能生蛆的实验投影片,巴思德的“鹅颈瓶实验”投影片,原始地球的投影片,米勒实验的投影片。根据本节教材用实验和猜测相结合的方法来说明生命起源的特点,教学方法也就选择学生观察投影片、猜测和查资料相结合的方法进行教学。shouldweadaptthenewcenturyby,theloadgetupthenewcenturyheavyburden?Notonlyscienceandtechnologychangingwithea