中考英语专项练习科普知识类阅读1.docx

中考英语专项练习科普知识类阅读1.docx

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中考英语专项练习科普知识类阅读1

科普知识类阅读

一．阅读理解（共15小题）

1．Whatisyourfavoritefood？

Wehavealotofhealthyfoodsinoureverydaylife，suchasmilk，bread，eggs，fruitsandvegetables．Theycangiveyouenergytogrow．

Beforeyourbodyusesthefoodyoueat，ithastochangethefood．That'swhatdigestionmeans．

Digestionbeginswithchewing（咀嚼）．Youchewslowlyyourfoodwithyourteeth，thesmallerthepiecesoffoodbecome．Afteryouswallow（咽下）yourfood，itwillmovetoyourstomach．Yourstomachcanstretchtoholdthefood．Specialfluids（液体）comeinandhelptobreakthefoodintosmallerandsmallerpieces．Thefoodstaysinyourstomachforafewhours．Thenthefoodmovesintotheintestines（肠）．Thefirstpartisthesmallintestine．Itisabout21feetlong．There，thefoodbreaksdownintonutrients（营养素）andyourbodycanusethem．Bloodcarriesthenutrientstoallpartsofthebody．Yourbodycan'tuseeverythingyoueat．Anythingthatisnotusedgoestothelargeintestine，whichis4or5feetlongandmuchwiderthanthesmallintestine．Howtogetridof（去除）these？

Gotothewashroom!

根据材料内容选择最佳答案．

（1）Whichofthefollowingishealthyfood？

A．Milkandbread

B．Eggsandfruits．

C．Vegetables．

D．Alloftheabove

（2）Whatdoestheunderlinedword"digestion"meaninChinese？

A．消化

B．进食

C．营养

D．搅拌

（3）Wheredoesdigestionstart？

A．Inyourlargeintestine

B．Inyoursmallintestine

C．Inyourmouth

D．Inyourstomach

（4）Howlongisthelargeintestine？

A．About21feet

B．About26feet

C．About31feet．

D．About4or5feet

（5）WhichofthefollowingisNOTtrue？

A．Yourbodycanuseeverythingyoueat

B．Thelongeryouchewyourfoodwithyourteeth，thesmallerthepiecesoffoodbecome

C．Bloodcarriesthenutrientstoallpartsofthebody

D．Whenyougotothewashroom，thedigestionisfinished．

2．Youmustthinkacomputeristhebestthingintheworld，right？

Youmustthinkitworksatasuperspeedandcandoeverything？

Well，it'snot!

Infact，thebrainismuchmorepowerfulthananysupercomputer!

Thinkaboutwhenaglassisjustabouttofalloffthetable．Yourbraincontrolseverythingthatyouneedtodotosavethatglassfromfalling．Nocomputercouldevercomeclosetothat!

Thebrainweighsjust3pounds，butiscontrolseverythingyoudofromthinking，learning，feelingeventobreathingandyourheartbeating．Eventhoughthebrainisjust2%ofyourbodyweight，itusesaround20%ofallyourenergyinyourbody．Thatisalotforsuchasmallorgan（器官）．Thereareabout100billiontiny，tinylittlecells（细胞）inyourbrain．Therearesomanythatitwouldtakeyouover3，000yearstocountthemall!

Yourbrainstopsgrowingwhenyou're18，butitactuallykeepsondevelopingandlearningnewthings．Soyourparentsarereallysupersmart!

Youwon'tbeabletofoolthem!

Believeitornot，yourbrainNEVERstopsworking．Evenduringsleeping，thebrainworksforlong﹣termmemoryestablishment（建立）．Itisrealizedthatthebrainisthesecondorganinthebodyastheheartthatneverstopsduringhumanlives．

Soeveryoneshouldbeproudofsuchagiftofnature．

（1）InParagraph1，thewriterwantstotellus　　．

A．eyesandmusclesreactquickly

B．thebraincontrolseverythinginyourbody

C．thebrainismorepowerfulthananycomputer

D．thecomputeristhebestthingintheworld

（2）InParagraph2，theunderlineword"That"refersto　　．

A．thebodyweight

B．2%ofthebodyweight

C．allenergyinthebody

D．around20%oftheenergyinthebody

（3）WhichisRIGHTaccordingtothepassage？

A．Thebrainkeepsondevelopingduringhumanlives．

B．Thebraindoesn'tworkduringsleeping．

C．Thebrainistheonlyorganthatneverstops．

D．Thebrainkeepsgrowingduringhumanlives．

（4）Inwhichmagazinecanwereadthepassage？

A．BusinessWeekly．

B．Science．

C．Sports．

D．Medicine．

3．A7﹣magnitude（震级）earthquakehitYa'an，Sichuanat8：

02onApril20，2013，anditkilledatleast196peopleandinjuredmorethan11，000．

Togetherwithotherstudents，YangXuelanranouttotheplayground．Shewassafe．Butallhertextbooksandexercisebookswereburied（埋）intheteachingbuilding．

Whatcanwedowhenanearthquakehappens？

Infact，there'slittlewecandotostopnaturaldisasters（自然灾害）suchasearthquakeshappening．But，somemethodscanreducetheharmtheycause．

◆Dropdownontoyourhandsandknees．Thiswaycanprotectyoufromfalling．

◆Coveryourheadunderastrongtableordesk．Youcanalsostayalongawall，andcoveryourheadwithyourarmsandhands．

◆Holdonto（守住，抓牢）yourshelter（遮蔽物）untiltheshakingstops．Bepreparedtomovewithyourshelteriftheshakingcontinues．

Schoolscannormallytaketheearthquakedrills（演练）tohelpstudentstayalive．

（1）WhentheearthquakehappenedinYa'an，YangXuelanwas　　．

A．athome

B．atschool

C．onherwaytoschool

D．playingonth