2021_2022学年广东深圳宝安区深圳市宝安中学初三上学期期中英语试卷
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2023-06-09 20:51:44
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2021~2022学年广东深圳宝安区深圳市宝安中学初三上学期期中英语试卷1.1.2.3.4.5.6.7.8.9.Numbersenseisnottheabilitytocount.Itistheabilitytorecognizeachangeinnumber.Humanbeingsarebornwiththisability.1,experimentsshowthatmanyanimalsare,too.Forexample,manybirdshavegoodnumbersense.If2nesthasfoureggsandyouremoveone,thebirdwillnotice.However,ifyouremovetwo,thebirdgenerallyleaves.Thismeansthatthebird3thedifferencebetweentwoandthree.Anotherinterestingexperimentshowedabird's4numbersense.Amanwastryingtotakeaphotoofacrow(乌鸦)thathadanestinatower,butthecrowalwaysleftwhenshesawhimcoming.Thebirddidnot5untilthemanleftthetower.Themanhadanidea.Hetookanothermanwithhimtothetower.Onemanleftandtheotherstayed,buttheyweren'tsuccessfulinfoolingthebird.Thecrowstayedaway6thesecondmanleft,too.Theexperimentwas7withthreemenandthenwithfourmen.Itwasnotuntilfivemenwentintothetowerandonlyfourleftthattheyfinallymanagedtotakeaphoto.Howgoodisahuman'snumbersense?It'snotverygood.Forexample,babiesaboutfourteenmonthsold8noticeifsomethingistakenawayfromasmall
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