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1、高一必修①指数与指数函数试题归纳精编答案沈阳市同泽高级中学谷凤军2007年10月15日（一）指数1、化简［］的结果为（B）A．5B．C．－D．－52、将化为分数指数幂的形式为（A）A．B．C．D．3、化简(a,b为正数)的结果是（C）A．B．abC．D．a2b4、化简，结果是（A）A、B、C、D、5、=__________．196、=__________．7、=__________。1008、=__________。meettheconstructiondrawingsprovidedstrengthandworkabilityof
2、constructionrequirements,mixingratiomustbedeterminedbytest.Constructionwhenyouneedtochangethemixofcementitiousmaterial,retesting,andsubmittedtothesupervisorforapproval.(2)mixingofcementitiousmaterials,shouldbecarriedoutstrictlyaccordingtothetesttodeterminetheingredient
3、sofingredients,notampering,ingredientweighingerrorsshouldbeallowedsubjecttothefollowing:cement±2%;sand,gravelis±3%,water,additives±1%.(3)thecementitiousmaterialinthemixingprocessshouldremainofcoarseandfineaggregatewaterstability,accordingtochangesinmoisturecontentofagg
4、regateandadjustwatertoensuretheaccuracyofthewater/cementratio.(4)mixingtimeofcementitiousmaterials:mechanicalmixingofnotlessthan2~3min,notartificialmix.Localsmallartificialmixtureofdrymixatleastthreetimes,thenwet-mixtouniformcolor,canbeused.(5)withcementitiousmaterials
5、shouldbemixed.Cementitiousmaterialsallowedintervalshouldbedeterminedthroughexperiments,orrefertothetableselected.Segregationduringtransportandstorage,watermortarandmasonrybeforemixingagain,initialsettingofcementitiousmaterialsshallnotbeused.Cementitiousmaterialsallowbr
6、eakswhenlayingtemperature(℃)allowedinterval(min),ordinaryPortlandcementandslagPortlandcement20~309012010~201351805~10195/8.4.5andpozzolanacementmasonrymasonrywithPucastingmethod,theprocessis:masonrypreparation–materialselection→putspulpplacedstone→...8.58.5.1masonrymor
7、tarforconstructionofmasonrysandinthesand,andsiftthesandshallnotincludegrass-rootsandotherdebris.Sandclaydoesnotexceed5%.Mixingofmortar350Lmortarmixer.Mixingtime,finishedfeeding,andshallnotbelessthan1.5min,thebatchingprocess,cementbatchingerrorcontrolwithin±5%.Mortarmix
8、usedcementmortarusedintheblendedinto3h,suchasatemperatureofover30°cduringtheconstructionperiod,within2Hoftheblendedin
