1.某循环热源温度为527℃,冷源温度为27℃,在此温度范围内循环可能达到的最大热效率是多少?解:已知T1=273+527=800KT2=273+27=300Kη最大=η卡=1-T2/T1=1-300/800=0.6252.锅炉在额定负荷670T/H下的排烟温度tDPYE=135℃,送风温度tDfE=20℃,排烟过剩空气系数αDPYE=1.35,飞灰及炉渣可燃物焓量均为CDhzE=3.7%,煤的发热量Q=4.18×4800KJ/kg,灰分A=27%,煤种函数K1=3.54,K2=0.56,化学未完全燃烧损失q3=0.3%,灰渣物理热损失q6=0.2...
1.Iwilltellhimassoonashe_____backA.comeB.comesC.willcomeD.came2.Mary_____onshoeswhenshe____them.A.triesbuysB.triesbuiesC.trysbuysD.trysbuies3.Thegirloften______coldwhenshe______.A.cathcsdancesB.catchesdancesC.catchsdanceesD.catchesdancee4._____he____himselfthereNo,Idontthinkso.A.DoenjoyB.DoesenjoiesC.DoesenjoysD.Doesenjoy5._____yourteacher____fromthemveryoftenCertainly.A.DohearB.DoeshearC.Dorec...
1.听句子,选择与其所对应的图片。每个句子读一遍。(5分)1._________2._________3._________4._________5.__________II.听五段短对话,选择正确答案。每段对话读两遍。(5分)6.Whosebackpackisgreen?A.Lucy’sB.Jack’sC.John’s7.WhatdoesAmydoeverymorning?A.Sheruns.B.Sheeatsanapple.C.Shetakesashower.8.What’sthetelephonenumberofTony’scar?A.5936B.4935C.59459.What’sintheman’sfridge?A.Somemeat.B.Somevegetables....
主谓一致是指:1)语法形式上要一致,即单复数形式与谓语要一致。2)意义上要一致,即主语意义上的单复数要与谓语的单复数形式一致。3)就近原则,即谓语动词的单复形式取决于最靠近它的词语,一般来说,不可数名词用动词单数,可数名词复数用动词复数。例如:Thereismuchwaterinthethermos.但当不可数名词前有表示数量的复数名词时,谓语动词用复数形式。例如:Tenthousandtonsofcoalwereproducedlastyear.15.1并列结构作主语时谓...
第一部分:基础题1._______makeshisshopdifferentisthatitoffersmorepersonalservices.A.WhatB.WhoC.WhateverD.Whoever2.—Itsthirtyyearssincewelastmet.—ButIstillrememberthestory,believeitornot,_______wegotlostonarainynight.A.whichB.thatC.whatD.when3.Seetheflagsontopofthebuilding?Thatwas_______wedidthismorning.A.whenB.whichC.whereD.What4.—Couldyoudomeafavor?—Itdependson_______itis.A.whichB.whichever...
Part1基础巩固单项选择。()1.-Whatdidyourteachersaytoyoujustnow?-Hetoldmethattwothirdsoftheearthwithwater.(甘肃天水中考)A.iscoveringB.arecoveringC.wascoveredD.iscovered()2.-Whatdidyoursonsayintheletter?-HetoldmethathetheDisneyWorldthenextday.(河南安阳校级开学检测)A.willvisitB.hasvisitedC.hadvisitedD.wouldvisit()3.-Didhesayanythingabouthimselfyesterday?-Yes.HetoldmethatheEnglishsincehecamehere.(江...
Part1基础巩固单项选择。mistakesduringthe()1.-Whatshouldwepayattentiontoexams?-Somedetails.(四川广元中考)A.avoidingmakingB.avoidtomakeC.toavoidmakingD.avoidingmake()2.-ItriedtomakeAlicehermindbutIfounditdifficult.Well,IsawyouthatwhenIwentpast.(四川南充中考)A.changed;doB.changes;doingC.change;todoD.change;doing()3.Ourteacheroftenasksustime.(辽宁阜新中考)A.notwasteB.dontwasteC.nottowasteD.doesntwa...
Part1基础巩固单项选择。()1.WhereweshouldgonextFriday.(辽宁营口中考)A.isdecidedB.wasdecidedC.willbedecidedD.hasbeendecided()2.Halfoftheworkbynow.(广西柳州中考)A.hasfinishedB.hasbeenfinishedC.havebeenfinishedD.hadbeenfinished()3.Thesegreatbooksbypeopleallovertheworldtoday.(广西桂林中考)A.werereadB.readC.arereadD.isread()4.Thesegiftsbychildrenintheirlastsummerholidays.(河北中考)A.madeB.weremadeC.m...