powers核能的danger.docx

powers核能的danger.docx

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powers核能的danger

（一）

Nuclearpower's（核能的）dangertohealth,safety,andevenlifeitselfcanbedescribedinoneword:

radiation（辐射）.

Nuclearradiationhasacertainmysteryaboutit,partlybecauseitcannotbedetected（探测）byhumansenses.Itcan'tbeseenorheard,ortouchedortasted,eventhoughitmaybeallaroundus.Thereareotherthingslikethat.Forexample,radiowavesareallaroundusbutwecan'tdetectthem,sensethemwithoutaradioreceiver.Similarly,wecan'tsenseradioactivitywithoutaradiationdetector.Butunlikecommonradiowaves,nuclearradiationisnotharmlesstohumanbeingsandotherlivingthings.Atveryhighlevels,radiationcankillananimalorhumanbeingoutrightbykillingmassesofcells（细胞）inimportantorgans（器官）.Buteventhelowestlevelscandoseriousdamage.Thereisnolevelofradiationthatiscompletelysafe.Iftheradiationdoesnothitanythingimportant,thedamagemaynotbesignificant.Thisisthecasewhenonlyafewcellsarehit,andiftheyarekilledoutright.Yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamaged,andiftheyreproducethemselves,youmaybeintrouble.Theyreproducethemselvesinanunusualway.Theycangrowintocancer.Sometimesthisdoesnotshowupformanyyears.

Thisisanotherreasonforsomeofthemysteryaboutnuclearradiation.Seriousdamagecanbedonewithouttheknowledgeofthepersonatthetimethatdamagehasoccurred.Apersoncanbeirradiated（放射治疗）andfeelfine,thendieofcancerfive,ten,ortwentyyearslaterasaresult.Orachildcanbebornweakoreasytogetseriousillnessasaresultofradiationabsorbedbyitsgrandparents.

Radiationcanhurtus.Wemustknowthetruth.

1.Accordingtothepassage,thedangerofnuclearpowerliesin__________.

A.nuclearmysteryB.radiationdetection

C.radiationlevelD.nuclearradiation

2.Radiationcanleadtoseriousresultsevenatthelowestlevel________.

A.whenitkillsfewcellsB.ifitdamagesfewcells

C.thoughthedamagedcellscanrepairthemselves

D.unlessthedamagedcellscanreproducethemselves

3.Radiationcanhurtusinthewaythatitcan_____.

A.killlargenumbersofcellsinmainorganssoastocausedeathimmediately

B.damagecellswhichmaygrowintocanceryearslater

C.affectthehealthygrowthofouryoungergeneration

D.leadtoalloftheaboveresults

4.Whichofthefollowingcanbebestinferredfromthepassage?

A.Theimportanceofprotectionfromradiationcannotbeoveremphasized（过分强调）.

B.Themysteryaboutradiationremainsunsolved.

C.Cancerismainlycausedbyradiation.

D.Radiationcanhurtthosewhodonotknowaboutitsdanger.

（DBDA）

（二）

Sheisacute,quietgirl.Asadaughter,shehasnosecretstowardshermother,whoisverymuchpleasedwithher.Butrecentlyshehasbecomesomewhatmysterious,notsoopen-mindedasbefore.Shehasadiarythatshekeepsunderlockandkey.Mothercannothelpworryingabouther:

whatifshefallsinlove,whichistooearlyforagirlofherage.Afterallsheisreachingthe'dangerousstage'.Thesethoughtshavecausedtroubleinthemother'smind.

　Oneweekendthegirlcametotellthatshewasgoingtothecinemawithherschoolmateandwouldreturnlate.Asthiswasthefirsttimehermotherconsented,butcouldn'tresistworryingbecauseshehadneverbeenawayatnightbefore.Themotherwaitedtillnineandheruneasinessgottheupperhandoverher.Shedecidedgoingouttomeetherdaughter.Justatthemomentthenoiseofacarpullingupdrewhertothewindowand-therewasherdaughter,wavinggoodbyetoaboy.Herheartmissedabeat.Whenthegirlcamein,themotherwaswatchingTV,pretendingnothinghadhappened."Mum,I'mback.""Yeah.""Sorrytobelate.Stillsittingup?

""Yes.Oh.that...Who'sthatboy?

"Thedaughterwasstunned（发愣）foramoment."Ah.It'smymonitor.Hegavemealiftonhiswayhome.Mum,I'mgoingtobed.""Allright.Gotosleepearly."

　Nextmorningwhenthemotherwenttothedaughter'sroomtodosometidying,shefoundherdiaryleftatherpillow.Afterafewminutes'hesitationsheeventuallyopenedittotheentryofthenightbefore.Itreads:

Mum,it'slovethatmadeyouask,butitwouldshowyourunderstandingofmeifyouhadn't.

　　Holdingthediary,themotherfellintothought.

1.Whichisthecorrectorderaccordingtothestory?

a.Shetookaliftbackinhermonitor'scar.

b.Shewenttoseeafilmwithherclassmate.

c.Shewroteinherdiarytohermother.

d.HermotherpretendedtowatchTV.

e.Hermotherworriedaboutherdaughter'sreturninglate.

A.b,e,a,d,cB.e,b,a,d,c

C.b,a,e,d,cD.b,e,a,c,d

2.Fromthediary,wecanseethedaughter________.

A.thankedhermotherforaskingher

B.thoughthermothercaredaboutherverymuch

C.thoughtitwashermother'sdutytoask

D.tho