当前位置:考试网  > 试卷库  > 学历类  > 自考  > 自考专业(建筑工程)  > 建筑材料  > 试讨论砂率如何随着砂子本身的粗细、粗骨料的最大粒径及其表面性状(指碎石或卵石)而变化?
试题预览

试讨论砂率如何随着砂子本身的粗细、粗骨料的最大粒径及其表面性状(指碎石或卵石)而变化?

查看答案
收藏
纠错
正确答案:

砂子越粗,砂率越大;砂子越细,砂率越小。粗骨料的最大粒径越大,砂率越小。碎石砂率比卵石适当大些。

答案解析:

暂无解析

你可能感兴趣的试题

石灰的碳化反应式是()

木材的木节会降低其抗压和抗拉强度。

当混凝土拌合物出现粘聚性尚好、坍落度太大时,应在保持 ______不变的情况下,适当地增加 ______用量。

测试混凝土静力受压弹性模量时标准试件的尺寸为()

高铝水泥在20-30℃时的主要水化产物是()

热门试题 更多>
试题分类: 初级(口语)
练习次数:0次
Investingthousandsofpoundsintherecruitmentandtrainingofeachnewgraduaterecruitmaybejustthebeginning.Choosingthewrongcandidatemayleaveanorganisationpayingforyearstocome. Fewcompanieswillhaveescapedallofthefollowingfailures:peoplewhopanicatthefirstsightofstress;thosewithlongimpressivequalificationswhoseemincapableoflearning;hypochondriacswhoseabsenteerecordbecomesastonishing;andtheunstablepersonlaterdiscoveredtobeathieforworse. Lessdramatic,butjustasmuchaproblem,isthepersonwhosimplydoesnotcomeuptoexpectations,whodoesnotquitedeliver;whoneverbecomesahigh-flierorevenasteadyperformer;theemployeewithafinefuturebehindthem. Thefirstpointtobearinmindattherecruitmentstageisthatpeopledon’tchange.Intelligencelevelsdeclinemodestly,butchangelittleovertheirworkinglife.Thesameistrueofabilities,suchaslearninglanguagesandhandlingnumbers. Mostpeopleliketothinkthatpersonalitycanchange,particularlythemorenegativefeaturessuchasanxiety,lowesteem,impulsivenessoralackofemotionalwarmth.Butdatacollectedover50yearsgivesaclearmessage:stillstableafteralltheseyears.Extrovertsbecomeslightlylessextroverted;theacutelyshyappearalittlelessso,butthefundamentalsremainmuchthesame.Personalcrisescanaffectthewaywecopewiththings:wemighttakeupordropdrink,drugs,religionorrelaxationtechniques,whichcanbehaveprettydramaticeffects.Skillscanbeimproved,andnewonesintroduced,butatratherdifferentrates.Peoplecanbegroomedforajob.Justaspoliticiansarecarefullyrepackagedthroughdress,hairstyleandspeechspecialists,sopeoplecanbesentontrainingcourses,diplomasorexperimentalweekends.Butthereisacosttoallthiswhichmaybemorethanthepriceofthecourse.Bettertoselectforwhatyouactuallyseeratherthanattempttochangeit. ()1.Thepurposeofthispassageistogivemanagerstheadvicethat. A.Employersshouldselectcandidatesfortheirpotential. B.Employersshouldselectcandidatesforwhattheyareratherthanfortheirpotential. C.Employersshouldselectthenewlygraduatedandsendthemontrainingcourses,diplomasorexperimentalweekends. D.Employersshouldselectexperiencedcandidatestoavoidspendingthousandsofpoundsintraining. ()2.Accordingtothepassage,whichofthefollowingstatementsistrue?. A.Absolutely,Peopledon’tchangeduringtheirworkinglives. B.Generally,peoplechangetoalargeextentduringtheirworkinglives. C.Fundamentally,peoplestaythesameduringtheirworkinglives. D.Normally,peopledon’tchangeatallduringtheirworkinglives. ()3.Whatdoesafinefuturebehindthem(line3ofparagraph3)means?. A.Somepeoplewillcertainlyhaveapromisingfuturethoughtheyarenotverycompetentintheirpresentwork. B.Somepeopledon’thaveanypotentialfortheirworkthoughtheyareemployed. C.Somepeoplecanhaveabrightfuturethoughtheycan’tdotheirworkwell. D.Somepeoplehavepotentialwhentheyareemployed,butneverrealizethatpotential. ()4.Accordingtothepassage,people’sbasicabilitieslikelanguagelearningandnumeracy. A.changelittleovertheirworkinglife. B.neverchangeovertheirworkinglife. C.changefundamentallyovertheirworkinglife. D.changeprofoundlyovertheirworkinglife. ()5.Theworddeliver(line2ofparagraph3)means. A.totakegoodstotheplacesorpeopletheyareaddressedto B.togiveaspeech C.todowhatyoupromisedtodo D.tohelpawomantogivebirthtoababy.
试题分类: 初级(阅读)
练习次数:1次
试题分类: 口语
练习次数:1次
试题分类: 初级(口语)
练习次数:2次
扫一扫,手机做题