职称英语考试《理工类》每日一练精选及答案052840.docx

职称英语考试《理工类》每日一练精选及答案052840.docx

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职称英语考试《理工类》每日一练精选及答案052840

职称英语考试《理工类》每日一练精选及答案0528-40

1、SeeingRedMeansDangerAhead

Thecolorredoftenmeansdangerandbypayingattention,accidentscanbeprevented.Inthefuture,thecolorredalsomayhelppreventdangeratconstructionsites.Thankstonewworkbyengineers,bridgesupportsorotherkindsofmaterials,couldonedaycontainacolor-changingmaterial.Itwillturnredbeforeastructurecollapsesorfallsapart.

Thesecret_____thecolor-changingmaterialisaparticulartypeofmolecule（分子）.Amoleculeisagroupofatoms（原子）heldtogetherbychemicalbonds.Moleculescomeinallshapesandsizesandmakeupeverythingyoucansee,touchorfeel.Howamoleculebehavesdependsonwhatkindsofatomsitcontainsandhowthey'reheldtogether.

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"sixthsense"-orsomeothermythicalpower-isanenduringonewhichtheevidenceonSriLanka'sravagedcoastislikelytoaddto.TheRomanssawowlsasomensofimpendingdisasterandmanyancientculturesviewedelephantsassacredanimalsendowedwithspecialpowersorattributes.

【单选题】

A.additional

B.specific

C.especial

D.exceptional

正确答案:

B

答案解析:

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

正确答案:

D

答案解析:

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