应用化学专业英语(课后答案和课文翻译).doc

(完整版)应用化学专业英语(课后答案和课文翻译)(完整版)应用化学专业英语(课后答案和课文翻译)(完整版)应用化学专业英语(课后答案和课文翻译)Unit1TheRootsofChemistryI。Comprehension。1.ItcanbeinferredfromthisarticlewhichoneofthefollowingitemsisnotmainlybasedonpracticaluseC。Greekchemistry2。ItwasB。Empedoclesswhofirstintroducedtheideathatallthingsarenotformedfromjustoneelement。3。InthedevelopmentofGreekchemistry,D.Democrituswasthefirstonedefinitingtheultimatelyconstituentsofmatter?4.AccordingtoPlato，thereareB。4“elements”whosefacesareconstitutedbyregularpolygons.5.Inthelastparagraph,authorsthinkthatexperimentDD。candealwiththereactionsbywhichonesubstanceisconvertedintoanotherII。Makeasentenceoutofeachitembyrearrangingthewordsinbrackets。Thepurificationofanorganiccompoundisusuallyamatterofconsiderabledifficulty，anditisnecessarytoemployvariousmethodsforthispurpose.Scienceisanever—increasingbodyofaccumulatedandsystematizedknowledgeandisalsoanactivitybywhichknowledgeisgenerated。Life,afterall,isonlychemistry，infact，asmallexampleofchemistryobservedonasinglemundaneplanet。Peoplearemadeofmolecules；someofthemoleculesinpeoplearerathersimplewhereasothersarehighlycomplex.Chemistryiseverpresentinourlivesfrombirthtodeathbecausewithoutchemistrythereisneitherlifenordeath.Mathematicsappearstobealmostashumankindandalsopermeatesallaspectsofhumanlife，althoughmanyofusarenotfullyawareofthis。III.Translation。（a）化学过程；(b）自然科学；(c)蒸馏技术(a）chemicalprocess(b)naturalscience（c）thetechniqueofdistillation正是原子构成铁、水、氧等。Itistheatomsthatmakeupiron,water,oxygenandsoon。化学具有悠久的历史，事实上，人类的化学活动可追溯到无记录时代以前Chemistryhasaverylonghistory，infact，humanactivityinchemistrygoesbacktoprerecordedtimes/predatingrecordedtimes。根据水的蒸发现象，人们认识到液体在一定条件下可以变成气体Accordingtotheevaporationofwater,peopleknow/realizedthatliquidscanturn/be/changeintogasesundercertainconditions/circumstance/environment.在你使用这种材料之前,你必须弄清它的各种性质Youmustmakesurethepropertiesofthematerialbeforeyouuseit.IV.Translation化学是三种基础自然科学之一,另外两种是物理和生物。自从宇宙大爆炸以来，化学过程持续进行，甚至地球上生命的出现可能也是化学过程的结果。人们也许认为生命是三步进化的最终结果，第一步非常快,其余两步相当慢.这三步是：(I)物理进化(化学元素的产生），(II）