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甲、乙、丙三种物质的质量与体积的关系如图所示．ρ甲、ρ乙、ρ丙、ρ水分别代表甲、乙、丙三种物质和水的密度，据图可知（ ）
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如图所示是甲乙丙三种固体物质的溶解度曲线下列说法正确的是
t℃时，甲、乙、丙三种物质的饱和溶液的质量分数相等
在两份相同质量的水中分别加入甲与丙，达到饱和时溶解甲的质量大于丙
相同温度时，甲、乙、丙三种饱和溶液，其质量分数关系为：甲>乙>丙
甲中混有少量丙时，可采用高温制成热的饱和溶液，再蒸发结晶提纯甲
小明在探究甲乙两种不同物质的质量和体积关系时得出了如图所示的图线由图线可知甲乙两种物质的密度之比ρ甲
如图是小明在探究甲乙丙三种物质质量与体积关系时作出的图像.分析图像可知
ρ
甲
>ρ
乙
>ρ
丙
ρ
甲
>ρ
丙
>ρ
乙
ρ
丙
>ρ
乙
>ρ
甲
ρ
乙
>ρ
甲
>ρ
丙
2015·北海如图1所示桌面上放有三个相同的玻璃杯分别装有质量相同的三种液体甲乙丙它们的质量与体积的
乙，丙，甲
甲，丙，乙
甲，乙，丙
丙，乙，甲
图5是小明在探究甲乙丙三种物质质量与体积关系时作出的图像.分析图像可知
ρ甲>ρ乙>ρ丙
ρ甲>ρ丙>ρ乙
ρ丙>ρ乙>ρ甲
ρ乙>ρ甲>ρ丙
甲乙两种物质的质量跟体积的关系如图所示关于它们的密度下列说法中正确的
甲的密度与乙的密度相等
乙的密度为 2.5 kg／m
甲的密度是乙的2倍
由这个图可知，甲、乙的密度都跟质量和体积有关
如图是甲乙丙三种物质质量与体积的关系图像其中甲丙为固体乙为液体足够多现用甲物质制成实心小球
，用丙物质制成实心小球
。则下列说法中正确的是 （ ） A.若A.B.两球质量相等，则B.球的体积小 B.将B.球放在乙液体中静止后一定漂浮
把A.球放入装满乙液体的杯中静止后，乙液体对杯底的压强不变
若A.B.两球的体积相等，则把两球放入乙液体中静止后，A.球受到的浮力大
甲乙两种物质它们的质量跟体积关系如图所示则ρ甲______ρ乙选填＞＜或＝其中乙物质可能是_____
小明在探究甲乙两种不同物质的质量和体积的关系时得出了如图所示的图象由图象可知甲乙两种物质的密度之比ρ
在探究物质的质量与体积关系的实验中得出甲乙两种物质的质量与体积的关系图象如图所示取等体积的两种物质则
如图1所示桌面上放有三个相同的玻璃杯分别装有质量相同的三种液体甲乙丙它们的质量与体积的关系如图2所示
乙、丙、甲
甲、丙、乙
甲、乙、丙
丙、乙、甲
甲乙丙三种物质的质量与体积的关系如图所示ρ甲ρ乙ρ丙ρ水分别代表甲乙丙三种物质和水的密度据图可知
ρ
甲
>ρ
乙
>ρ
丙
，且ρ
丙
>ρ
水
ρ
甲
>ρ
丙
>ρ
乙
，且ρ
丙
<ρ
水
ρ
丙
>ρ
乙
>ρ
甲
，且ρ
丙
=ρ
水
ρ
乙
>ρ
甲
>ρ
丙
，且ρ
丙
>ρ
水
如图是小明在探究甲乙丙三种物质质量与体积关系时作出的图像.分析图像可知
ρ
甲
>ρ
丙
>ρ
乙
甲的密度是丙的2倍
丙的密度是乙的1/2
甲、乙、丙三种物质密度之比为1∶2∶3
如图所示是甲乙丙三种固体物质的溶解度曲线下列说法正确的是
t℃时，甲、乙、丙三种物质的饱和溶液的质量分数相等
在两份相同质量的水中分别加入甲与丙，达到饱和时溶解甲的质量大于丙
相同温度时，甲、乙、丙三种饱和溶液，其质量分数关系为：甲>乙>丙
甲中混有少量丙时，可采用高温制成热的饱和溶液，再蒸发结晶提纯甲
小华同学在探究甲乙两种物质的质量跟体积的关系时做出了如图7所示的图像根据图像提供的信息以下说法正确的
当甲和乙的体积相同时，甲的质量比乙的质量小
当甲和乙的质量相同时，甲的体积比乙的体积小
甲物质的质量与体积的比值比乙的大
两种物质的质量与体积的比值相同
在探究物质的质量与体积关系的实验中得出甲乙两种物质的质量与体积的关系图象如图所示取等体积的两种物质则
如图1所示是探究甲乙两种物质质量跟体积关系的图像以下分析正确的是
甲物质的质量跟体积的比值比乙物质的大
甲物体的质量跟体积的比值比乙物质的小
相同物质的质量跟体积的比值是不同的
不同物质的质量跟体积的比值是相同的
甲乙两种物质的质量和体积关系如图所示由图象可知:
ρ甲>ρ乙 ;
ρ甲<ρ乙;
若V甲=V乙，则m甲
若m甲=m乙，则V甲>V乙.
等质量的甲乙丙三种金属分别与足量的溶质质量分数相同的稀硫酸完全反应后都生成＋2价的硫酸盐其产生氢气的
三种金属的活动性大小为甲>乙>丙
反应时消耗硫酸的质量一定相同
三种金属的相对原子质量是甲>乙>丙
反应速率最快的是甲，最慢的是乙
如图所示是甲乙丙三种固体物质的溶解度曲线下列说法正确的是
t℃时，甲、乙、丙三种物质的饱和溶液的质量分数相等
在两份相同质量的水中分别加入甲与丙，达到饱和时溶解甲 的质量大于丙
相同温度时，甲、乙、丙三种饱和溶液，其质量分数关系为： 甲>乙>丙
甲中混有少量丙时，可采用高温制成热的饱和溶液，再蒸发结晶提纯甲
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3分Ihavesomeinworkingouttheproblem. A.difficulty B.difficulties C.troubles D.difficult
尽管我的女儿对失去某些玩具也感到伤心但是她更通情达理.Mydaughterwas althoughshealsofeltsad certaintoys.
Iusedtobelievepolitenesswasathingofthepast.VeryseldomhaveI1apolitehumanbeinginthismodernsociety.HoweverIhadto2mythinkingwhenIwithtwoofmygrown﹣updaughterscamefacetofacewithsuchagentlemaninacoffeeplace.Theplacewas3withcustomersandwehadtoclimbsteepstairstofindanemptytable.4enjoyingcoffeeandsnackswewentdownthe5stairswheretherewashardlyanyspaceforanotherpersontoeither6orcomedown.JustasIwasinthemiddleofmydescent下楼agentlemanenteredthemainentrancewhichwas7infrontofthestaircase.IwassureIwouldbe8roughlybythismangoingup.IkeptcomingdownasfastasIcould.Mysmartdaughterswerealreadydownlookingupatme9hopingIwouldreachthembeforethestrangerstartedupthestairsknowingIwasa10sort.11reachingmydaughtersInoticedthemanstillstandingnearthedoor.Ireachedthemandpassedthe12attheentrancedoorwhichhe13holdingopen.Ilookedbackthinkinghewasstillatthedoordecidingwhethertogoin14findanotherlesscrowdedplace.IsawhimgoingupthestairsandItoldmydaughtersaboutit.Wethreefelt15thatwedidnoteven16thepolitegentlemanwhowasactually17thedooropenforusladies.We18hiskindnessforsuchwell﹣manneredpeopleare19tofindthesedays.20Irememberthisgentlemanandpraythattherewillbemorehumanbeingslikehim. 1.A.broughtup B.turneddown C.appealedto D.comeacross 2.A.shape B.change C.confirm D.identify 3.A.provided B.equipped C.packed D.spotted 4.A.After B.Before C.When D.Upon 5.A.wide B.high C.low D.narrow 6.A.turnaround B.setoff C.goup D.reachout 7.A.much B.right C.closely D.directly 8.A.injured B.pushed C.arrested D.denied 9.A.delightedly B.worriedly C.heartily D.sadly 10.A.genuine B.pessimistic C.nervous D.dynamic 11.A.Nearly B.Hardly C.Slightly D.Previously 12.A.daughters B.waiter C.manager D.stranger 13.A.kept B.avoided C.enjoyed D.resisted 14.A.and B.but C.so D.or 15.A.innocent B.sensible C.ashamed D.jealous 16.A.award B.remind C.consult D.thank 17.A.crashing B.holding C.seeking D.forcing 18.A.applauded B.distinguished C.commented D.witnessed 19.A.rare B.easy C.unlikely D.common 20.A.Ingeneral B.Atlength C.Atlast D.Tillnow
California'sRedwoodNationalPark Standinthemiddleofthevastredwoodforestsandyoumayfeellikeyouhavesteppedbackintime.It'shardnottobeamazedwhenyou'restaringatEarth'stallestlivingthings.Andthatfeelingcontinueseverywhereinthepark.Whetherwalkingalongthebeachesorhikinginthewoodsvisitorsareinaweofthenaturalsurroundingsvariouswildlifeandquietpeace. ●History: Old﹣growthredwoodforestsusedtocovermorethan2000000acresoftheCaliforniacoast.Atthattimeabout1850NativeAmericanslivedinthenorthernareauntillumbermen伐木工人discoveredit.Manytreeswerecutdown.In1918theSave﹣the﹣RedwoodsLeaguewasformedinanefforttoprotecttheareaandby1920manystateparksweresetup.RedwoodNationalParkwascreatedin1968eventhoughabout90%oftheoriginalredwoodtreeshadalreadybeencutdown. ●WhentoVisit: Summersarewarm.Itisthebusiesttimeoftheyear.Wintersarecoolandprovideadifferentkindofvisit.Ifyouenjoybird﹣watchingplanyourvisitduringthespring.Youmayalsowanttoconsideravisitduringthefalltocatchtheamazingfallenleaves.. ●GettingThere: ForthosedrivingintotheparkyouwilluseU.S.Highway101whetheryouaretravelingfromthenorthorsouth.IfyouaretravelingfromthenortheasttakeU.S.Highway199fromSouthForkRoadtoHowlandHillRoad. ●Fees/Permits: Oneofthebestthingsaboutthisnationalparkisit'sfreetovisit!That'sright!ThereisnoentrancefeeforRedwoodNationalPark.Howeverifyouplanoncampingintheparkfeesandreservations预约arerequired.Call800﹣444﹣7275formoreinformation. 25.TheunderlinedpartinaweofinParagraph1probablydescribesafeelingof. A.sadness B.loneliness C.amazement D.satisfaction 26.WhenRedwoodNationalParkwascreatedin1968. A.peoplebegantorealizethevalueofredwoods B.therewerefewold﹣growthredwoodslet C.old﹣growthredwoodforestscametolight D.NativeAmericansstilllivedinthearea 27.WhatcanwelearnaboutRedwoodNationalPark? A.Itisag7eatplacetovisitanytimeoftheyear. B.Thereisonlyonehighwayleadingtothepark. C.Visitorscancampintheparkforfree. D.ItisthefirststateparkintheUSA. 28.Thetextismostprobablytakenfrom. A.atravelguide B.ahistorypaper C.anewspaperreport D.ageographytextbook.
电磁波已广泛运用于很多领域．下列关于电磁波的说法符合实际的是A．电磁波不能产生衍射现象B．常用的遥控器通过发出紫外线脉冲信号来遥控电视机C．根据多普勒效应可以判断遥远天体相对于地球的运动速度D．电磁波是横波
太阳光通过三棱镜时在竖直放置的屏幕上形成如图所示的光带NP忽略三棱镜对各色光的吸收．若将灵敏温度计的测温端放在屏幕上的MNNPPQ区域时在哪个区域上升的示数最大
WhenIwasinfourthgradeIworkedpart﹣timeasapaperboy.Mrs.Stanleywasoneofmycustomers.She'dwatchmecomingdownherstreetandbythetimeI'dbikeduptoherdoorstepthere'dbeacolddrinkwaiting.I'dsitanddrinkwhileshetalked. Mrs.StanleytalkedmostlyaboutherdeadhusbandMr.StanleyandIwentshoppingthismorningshe'dsay.Thefirsttimeshesaidthatsoda汽水wentupmynose. ItoldmyfatherhowMrs.StanleytalkedasifMr.Stanleywerestillalive.DadsaidshewasprobablylonelyandthatIoughttositandlistenandnodmyheadandsmileandmaybeshe'dworkitoutofhersystem.Sothat'swhatIdidanditturnedoutDadwasright.Afterawhilesheseemedcontenttoleaveherhusbandoveratthecemetery墓地. Ifinallyquitdeliveringnewspapersanddidn'tseeMrs.Stanleyforseveralyears.Thenwecrossedpathsatachurchfund﹣raiser募捐活动.Shewasspooningmashedpotatoesandlookinghappy.Fouryearsbeforeshe'dhadtoofferherpaperboyadrinktohavesomeonetotalkwith.Nowshehadfriends.Herhusbandwasgonebutlifewenton. IliveinthecitynowandmypaperboyisaladynamedEdnawiththreekids.SheasksmehowI'mdoing.WhenIdon'tsayfineshesticksaroundtohearmyproblems.She'slivedinthecitymostofherlifebutsheknowsaboutcommunity.Communityisn'tsomuchaplaceasitisastateofmind.Youfinditwheneverpeopleaskhowyou'redoingbecausetheycareandnotbecausethey'regettingpaidtodoso.Sometimesit'sgoodtojustsmilenodyourheadandlisten. 1.Whydidsodagouptheauthor'snoseonetime? A.Hewastalkingfast. B.Hewasshocked. C.Hewasinahurry. D.Hewasabsent﹣minded. 2.WhydidtheauthorsitandlistentoMrs.StanleyaccordingtoParagraph3? A.Heenjoyedthedrink. B.Hewantedtobehelpful. C.Hetookthechancetorest. D.Hetriedtopleasehisdad. 3.Whichofthefollowingcanreplacetheunderlinedphraseworkitoutofhersystem? A.recoverfromhersadness B.moveoutoftheneighborhood C.turntoheroldfriends D.speakoutaboutherpast 4.Whatdoestheauthorthinkpeopleinacommunityshoulddo? A.Openuptoothers. B.Dependoneachother. C.Payforothers'help. D.Careaboutoneanother.
下列说法中正确的是A．雷达发射的电磁波是由均匀变化的电场或磁场产生的B．声源与观察者相互靠近时观察者所接收的频率大于声源振动的频率C．电磁波和声波一样在介质中的传播速度只与介质本身有关与频率无关D．在光的双缝干涉实验中若仅将入射光由绿光变为红光则条纹间距变宽
间谍卫星上装有某种遥感照相机可用来探测军用目标这种照相机能拍到晚上关灯行驶的汽车甚至车已经离开也瞒不过它这种遥感照相机敏感的电磁波属于
关于电磁波下列说法正确的是A．变化的电场周围产生变化的磁场变化的磁场周围产生变化的电场两者相互联系统称电磁场B．电磁波谱中最难发生衍射的是无线电波C．电磁波穿过两种介质的分界面时频率不会发生改变D．电磁波在同种介质中只能沿直线传播
你会怎样处理你筹集的钱呢?Whatwouldyou themoney
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反应时消耗硫酸的质量一定相同 三种金属的相对原子质量是甲>乙>丙 反应速率最快的是甲，最慢的是乙
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