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【Whilelearningthesciencelessons,Iusedtogetadoubt--whyear,nose,tongueandeyesshouldbecalledasspecialsenses?Thebasicreasonisthatthesearethechannelsthroughwhichwemaintaincontactwiththesurroundings.Thoughapparen】
1人问答
问题描述:

A.Youreyesbecomeweakandcannotseewell.
B.Youmayfeelenergeticandfresh.
C.Yourhearingpitchmaybedecreased.
D.Yourtonguemaylosethefunctionoftaste.

Whilelearningthesciencelessons,Iusedtogetadoubt--whyear,nose,tongueandeyesshouldbecalledasspecialsenses?Thebasicreasonisthatthesearethechannelsthroughwhichwemaintaincontactwiththesurroundings.Thoughapparentlyitmayfeelliketheseareindividualsensoryorgans,theydoshowsomeconnectivity.Interestingly,ourhearingislesssharpafterweeataheavyfood.Isn’titgoodforasoundnapafterastomach-fullmeal?Thatdoesnotmeanwegodeafafterameal,butthehearingpitch(强度)doeschangeafteraheavymeal.
Weusuallygivecreditofthetastetoourtongue,butdoyouknowthatunlesssaliva(唾液)dissolvessomething,ourtonguecannotrecognizethetasteofthefoodeaten.Tasteisnothingbutthefoodchemicalsdissolvedinthesalivabeingsensedbythetastebuds(味蕾)presentonthetongue.Trytodryoffyourtongueandmouthwithatissuepaperandthentastesomething.
Womenaremuchbettersmellersthanmen.Theyarebornwiththischaracteristicabilityandcancorrectlyrecognizetheexactfragranceofthesample.Weallcanstorealmost50,000differentsmells,whicharestronglytiedtothememories.
Pupils(瞳孔)donotrespondtolightalone,buttotheslightestbitofnoisearoundtoo.Thussurgeons,watchmakersandthoseprofessionalswhohavetoperformamuchdelicatejobdoprefertohaveasound-freeenvironment.Evenasmallnoisecanenlargetheirpupils,changethefocusandmaketheirvisionlessclear.
Eachandeveryoneofushasaparticularorindividualisticorcharacteristicsmell,whichisuniquetous,exceptthetwins.Thissmellisverysubtleyetcanbesensedevenbyanewborn.Itmaybeduetothissmellthatthenewbornrecognizesthepresenceofhisparentsaround.
小题1:Whatmayhappenafteryouhavehadarichlunch?

小题2:.Whatdoestheauthormeanbytheunderlinedsentenceinparagraph2?

A.Ourtonguescan’tbedriedwhileeatingsomething.

B.Ifyourtongueisdriedwithoutanysalivaonit,itwillnotwork.

董振东回答:
  小题1:C小题2:B小题3:C小题4:B   
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