日常生活类阅读(2012江苏)CMedicaldrugssometimescausemoredamagethantheycure.Onesolutiontothisproblemistoputthedrugsinsideacapsule,protectingthemfromthebody—andthebodyfromthem—untiltheycanbereleasedatjusttherightspot.Therearelotsofwaystotrigger(引发)thisrelease,includingchangingtemperature,acidity,andsoon.Buttriggerscancomewiththeirownrisks—burns,forexample.Now,researchersinCaliforniahavedesignedwhatcouldbeaharmlesstriggertodate:shiningnear-infraredlight(NIR,近红外线)onthedruginthecapsule.Theideaofusinglighttoliberatethedruginthecapsuleisn'tnew.Researchersaroundtheglobehavedevelopedpolymers(聚合物)andothermaterialsthatbegintobreakdownwhentheyabsorbcitherultraviolet(UV,紫外线)orvisiblelight.ButtissuesalsoreadilyabsorbUVandvisiblelight,whichmeansthedrugreleasecanbetriggeredonlyneartheskin,wherethelightcanreachthecapsule.NIRlightlargelypassesthroughtissues,soresearchershavetriedtouseitasatrigger.Butfewcompounds(化合物)absorbNIRwellandgothroughchemicalchanges.ThatchangedlastyearwhenAdahAlmutairi,achemistattheUniversityofCalifornia,SanDiego,reportedthatsheandhercolleagueshaddesignedapolymerthatbreaksdownwhenitabsorbsNIRlight.TheirpolymerusedacommerciallyavailableNIR-absorbinggroupcalledo-nitrobenzyl(ONB).Whentheycatchthelight,ONBgroupsfalloffthepolymer,leadingtoitsbreakdown.ButONBisonlyaso-soNIRabsorber,anditcouldbepoisonoustocellswhenitseparatesfromthepolymer.SoAlmutairiandhercolleaguesreportedcreatinganewmaterialforcapsulesthat'sevenbetter.Thisoneconsistsofalongchainofcompoundscalledcresolgroupslinkedinapolymer.Cresolcontainsreactive(易反应的)componentsthatmakeithighlyunstableinitspolymericform,afeatureAlmutairiandhercolleaguesusetotheiradvantage.Afterpolymerizingthecresols,theycapeachreactivecomponentwithalight-absorbingcompoundcalledBhc.WhentheBhcsabsorbNIRlight,thereactivegroupsareexposedandbreakthelongpolymerintotwoshortchains.Shiningadditionallightcontinuesthisbreakdown,potentiallyreleasinganydrugsinthecapsule.What'smore,Almutairisays,Bhcis10timesbetteratabsorbingNIRthanisONBandisnotpoisonoustocells.63.Accordingtothepassage,whichofthefollowingcouldbethebesttrigger?A.Temperaturechange.B.NIRlight.C.Aciditychange.D.UVlight.64.WhyinONBunsatisfactory?A.ItbreaksdownwhenitabsorbsNIRlight.B.Itfallsoffthepolymerandtriggersdrugrelease.C.Ithasnotcomeontothemarketuptillnow.D.Itisnoteffectiveenoughandcouldbepoisonous.65.Whichwordcanbeusedtocompletethefollowingprocessofchanges?A.ProtectedB.formedC.exposedD.combined【考点】日常生活类—说明文【文章大意】。本文围绕“怎样使用胶囊，让我们生病吃药更加安全、而且疗效好”这个主题展开研究，来展开话题的。63.【答案】B【试题解析】细节理解题。根据第一段“Now,researchersinCaliforniahavedesignedwhatcouldbeaharmlesstriggertodate:shiningnear-infraredlightonthedruginthecapsule.”可知，应选B项。【难度】一般64.【答案】D【试题解析】推理判断题。根据第三段中“…ONBgroupsfalloffthepolymer,leadingtoitsbreakdown”和“…anditcouldbepoisonoustocells…”可知，应选D项。【难度】较难65.【答案】C【试题解析】细节理解题。根据最后一段中“WhentheBhcsabsorbNIRlight,thereactivegroupsareexposed…”可知此处用exposed，即C项正确。【难度】一般【长难句解析】1.Researchersaroundtheglobehavedevelopedpolymers(聚合物)andothermaterialsthatbegintobreakdownwhentheyabsorbcitherultraviolet(UV,紫外线)orvisiblelight.本句是polymers(聚合物)andothermaterials的定语从句，when引导的时间状语从句...
