职称英语考试《理工类》每日一练精选及答案052840Word格式.docx
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Whenapolymer(聚合物)containingacolor-changingmoleculecalledamechanophore(机械响应性聚合物)isabouttobreak,itproducesacolor.Whenapolymerwithmechanophoremoleculesbecomes"
injured"
orweak,oneofthemechanophorebondsbreaksandthematerialturnsred."
It'
sareallysimpledetectionmethod,"
saysNancySottos,oneofthescientistswhoworkedontheproject.Sottosandherteamtestedthecolor-changingpolymersintheirlab.Thetestresultsprovedencouraging.
Thereisawaytogetridoftheredcolorlight.Whenabrightlightisshoneonthemechanophore,thebrokenbondisfixedandtheredcolordisappears.Thus"
self-healing"
maybeaproblemforengineers.Theyneedtousethecolor-changerinbigconstructionprojectsthatwillbeoutside,undersunlight.Andsunlightwillmakethemechanophore'
swarningsystemuseless.
Sottosandherfellowscientistsstillhavealotofworktodobeforethecolor-changingmoleculescanbeusedoutsidethelab.
【单选题】
A.on
B.behind
C.under
D.down
正确答案:
B
答案解析:
本题有一定难度,干扰项干扰较大,考查介词behind的用法,文章此处是说,“材料颜色可以变化其背后的秘密是……”,只有behind可以表示“背后的”意思,答案是B。
2、Animal'
s"
SixthSense"
AtsunamiwastriggeredbyanearthquakeintheIndianOceaninDecember,2004.ItkilledtensofthousandsofpeopleinAsiaandEastAfrica,Wildanimals,however,seemtohaveescapedthatterribletsunami.Thisphenomenonaddsweighttonotionsthattheypossessa"
sixthsense"
fordisasters,expertssaid.
SriLankanWildlifeofficialshavesaidthegiantwavesthatkilledover24,000peoplealongtheIndianOceanisland'
scoastclearlymissedwildbeasts,withnodeadanimalsfound.
"
Noelephantsaredead,notevenadeadrabbit.Ithinkanimalscansensedisaster.Theyhaveasixthsense.Theyknowwhenthingsarehappening"
H.D.Ratnayake,deputydirectorofSriLanka'
sWildlifeDepartment,saidaboutonemonthafterthetsunamiattack.Thewaveswashedfloodwatersupto2milesinlandatYalaNationalParkintheravagedsoutheast,SriLanka'
sbiggestwildlifereserveandhometohundredsofwildelephantsandseveralleopards.
Therehasbeenalotofscientificevidenceaboutdogsbarkingorbirdsmigratingbeforevolcaniceruptionsorearthquakes.Butithasnotbeenproven,"
saidMatthewvanLierop,ananimalbehaviorassistantatJohannesburgZoo."
Therehavebeenno______studiesbecauseyoucan'
treallytestitinalaborfieldsetting,"
hetoldReuters.Otherauthoritiesconcurredwiththisassessmetn.
Wildlifeseemtobeabletopickupcertainphenmenon,especiallybirds.Therearemanyreportsofbirdsdetectingimpendingdisasters,"
saidCliveWalker,whohaswrittenseveralbooksonAfricanwildlife.
Animalscertainlyrelyontheknownsensessuchassmellorhearingtoavoiddangersuchaspredators.Thenotionofananimal"
-orsomeothermythicalpower-isanenduringonewhichtheevidenceonSriLanka'
sravagedcoastislikelytoaddto.TheRomanssawowlsasomensofimpendingdisasterandmanyancientculturesviewedelephantsassacredanimalsendowedwithspecialpowersorattributes.
A.additional
B.specific
C.especial
D.exceptional
本段的第一句是说明为什么这些迹象(evidence)没有得到科学验证。
原因是科学家无法在实验室或野外进行特定的实验,以验证动物预见灾难的第六感觉。
理解了上下文的意思,就知道选specific是最合适的。
其他的三个选项的词义与上下文不符合,additional,especial和exceptional分别是“额外的”、“特别的”和“例外的”的意思。
3、Thechairmanproposedthatwestopthemeeting.【单选题】
A.stated
B.announced
C.demanded
D.suggested
D
主席建议我们中止会议。
本题难度不大,考查的是基本意义,干扰项干扰不大。
propose和suggest都有“建议”的意思,是近义词,A项指“陈述”,B项指“宣布”,C项指“要求”和答案意义差异大,最佳答案是D。
4、SingingAlarmsCouldSavetheBlind
Ifyoucannotsee,youmaynotbeabletofindyourwayoutofaburningbuildingandthatcouldbefatal.AcompanyinLeedscouldchangeallthatwithdirectionalsoundalarmscapableofguidingyoutotheexit.
SoundAlert,acompanyrunbytheUniversityofLeeds,isinstallingthealarmsinaresidentialhomeforblindpeopleinSommersetandaresourcecentrefortheblindinColumbia.Thealarmsproduceawiderangeoffrequenciesthatenablethebraintodeterminewherethesoundiscomingfrom.
DeborahWithingtonofSoundAlertsaysthatthealar