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1江西省2023-2024学年度八年级阶段性练习（一）化学试卷答案

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Byputtingthoughtsintowords,youaretellingyourselfthelogicbehindwhatyouthink,feel,oronlypartlyunderstand.Often,explainingathoughtistheprocessofunderstanding.Inotherwords,youincreaseyourbrainpowerbyexercisingyour"explainpower."Trythisexperiment.Explainhowyou'llincreaseyourbrainpower,evenifyouhavenoideahowrightnow.Juststartwithanything,andcrcateanexplanation.Forexample,startwith"I'lllearnchess,"or"I'llreadanarticleonthemindeveryweek."Explainhowthatwillhelp.You'llbesurprisedhowoftenthisbecomesaworkableplan,andifyouactuallydothis,you'llhaveabetterunderstandingofyourbraintwentyminutesfromnow.Anotherbenefitofwritingisthatithelpsyouremember.Many,ifnotmost,highlyproductivepeoplearealwaystakingnotes.Youcantrykeepingitallinyourhead,butifyoukeepajournalofyourideasthenexttimeyou'reworkingonabigproject,you'llprobablyhavemoresucccssWanttounderstandatopic?Writeabookaboutit.That'sanextremeexample,butifyouarelearningsomethingnew,writealettertoafriendaboutit,andyouwillunderstanditbetter.Wanttoinventsomcthing?Writeanexplanationoftheproblem,whyyouwanttosolveit,andwhyitisworthsolving,andyou'rehalf-waythere.Writersdon'talwayswritebecausetheyclearlyunderstandsomethingbeforehand.Often,theywriteaboutsomethingbecausetheywanttounderstandit.Youcandothesame.Writingwillhelpbringyoutoanunderstanding.Giveitatry.12.Whatwouldbethebesttitleforthetext?A.AWayonHowtoWriteB.BrainPowerHelpsImproveYourWritingC.IncreaseYourBrainPowerthroughWritingD.HowtoStartYourWriting13.Accordingtothetext,writingcanhelpyoualotinthefollowingwaysEXCEPTA.thedevelopmentofyourinterestinstudyB.theabilitytorememberC.theincreaseofyourbrainpowerD.thebetterunderstandingofatopic14.Ifawriterwritessomething,itmeansthatheorsheA.hasunderstooditverywellB.isexercisinghisorher“explainpower'”

3.某复杂钙钛矿晶体结构系统的三维原子和电子密度结构如图所示。以1号原子为坐标原点,晶胞参数为单位长度建立坐标系。下列有关说法错误的是A.该晶体的化学式为CaTiO3B.Ti原子位于氧原子形成的正八面体中心C.若品胞参数为a,则2、3号原子间的距离为D.2号原子的坐标参数为(12,1,12)

10.一种从工业电解精炼铜的阳极泥(含有Se、Au、Ag、CuSe、Ag7Se等)中提取硒的过程如图所示。下列说法正确的是A.电解精炼铜时纯铜作阳极烧”时,Ag2Se与O2反应每消耗1molO2,,转移的电子总数为4mol

1江西省2023-2024学年度八年级阶段性练习（一）化学