资源描述：
《大学英语三课后练习答案》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、《专业英语》练习专业年级班级姓名学号题号一二三四五总分得分一．单词短语中译英（每小题1分，共10分）1.钠2.乙醇3.丙烯4.亚硝酸钠5.甲烷6电池7.化合物8.金属有机9.氧10.物理化学二、单词短语英译中（每小题1分，共20分）1.significantfigure2.ConformationalIsomer3.reactiveintermediate4.substitutionreaction5.butanol6.freeradical7.thermodynamics8.kinetics9.Cycloalkane10.sodiumchloride11.ca
2、tion12.additionreaction13.ionizationenergy14.titrimetricmethod15.IUPAC16.Sodiumchloride17.carbonmonoxide18.carbondioxide19.Sulfuricacid20.Dihydrogenmonoxide三、选择题（每小题2分，共30分）1.Mixturescanbethecomponentsubstancesbyphysicalmeans,involvingphysicalchanges.(A)brokendown(B)decomposed(C)sepa
3、ratedinto(D)decompounded2.Aisachangethatdoesnotaltertheofthematter.(A)chemicalchange，physicalidentity(B)physicalchange，chemicalidentity(C)chemicalchange，chemicalidentity(D)physicalchange，physicalidentity3.Ancompoundisachemicalcompoundinwhichionsareheldtogetherinalatticestructurebyion
4、icbonds.(A)ionic(B)molecular(C)covalent(D)chemical－第4页（共6页）－4.Theandmoretightlyboundanelectronistothenucleus,themoreitwillbetoremove.(A)further,easy(B)closer,difficult(C)further,difficult(D)closer,easy5.oxidesareacidic;theyreactwithtoformsaltsandwater.(A)Nonmetal，acids(B)Metal，bases(
5、C)Metal，acids(D)Nonmetal，bases6.Thehavenononbondingelectronsandarecharged.(A)carbocations，positively(B)carbanions，negatively(C)carbocations，negatively(D)carbanions，positively7.Morehighlysubstituted,radicalsaremorestable,andtheobservedorderofstabilityis>>>.(A)primary,secondary,tertiar
6、y,methyl(B)methyl,tertiary,secondary,primary,(C)methyl,primary,secondary,tertiary(D)tertiary,secondary,primary,methyl8.IfthesubstituentsareremovedfromsidesoftheC-Cbond,thereactioniscalledananti.(A)same,elimination(B)opposite,substitution(C)opposite,elimination(D)same,substitution9.In
7、physicalchemistry，cantellyouonlythatareactionshouldgobecausetheproductsaremorestable(havealowerfreeenergy)thanthereactants.Ontheotherhand,cantellyouhowfastthereactionwillgobutdoesn'ttellyouanythingaboutthefinalstateofthingsonceitgetsthere.(A)kinetics，thermodynamics(B)kinetics，electro
8、chemistry(C)
