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免费?宅在家学英语?怎么报名?最牛英语口语培训模式躺在家里练口语,全程外教一对一,三个月畅谈无阻!洛基英语,免费体验全部在线一对一课程www.rockyclass.com/ielts/xd.htmlhttp://www.rockyclass.com/ielts/xd.html(报名网址)Directions:Thereare20blanksinthefollowingpassage.Foreachblanktherearefourchoicesmarked[A][B][C]and[D].YoushouldchoosetheONEthatbestfitsintothepassage.Daltonwonderedwhytheheavierandlightergasesintheatmospheredidnotseparateasoilandwaterdo.Hefinallyconcludedthattheconstituent1mustexistintheformof2particlesoratomsandthatthese3becompletelymixedtogetherinthe
4.Thisthrewanewlightin5lawsofdefiniteproportions.Itwas6necessarytosupposethattheatoms7combineintosmallgroupsofuniform8andsoformmorecomplexsubstance;9themysteryofthislawwas
10.Daltonsuggestedforexamplethatcarbonmonoxide11formedbytheonewithone12ofatomsofcarbonandoxygen13carbondioxideresultsfromasingle14ofcarbonunitingwithtwoatoms15oxygen.Assumingthistobetrue16thedefiniteproportionsofProutslaw17allchemicalcompoundsthedifferentconstituents18enterinunvaryingproportionswouldnaturally19therelativeweightsofthemany20kindsofatoms.
1.A.gasesB.piecesC.thingsD.gas
2.A.timelyB.trimmedC.tinyD.topical
3.A.oughtB.couldC.willD.must
4.A.skyB.atmosphereC.oxygenD.environment
5.A.variousB.manyC.theD.those
6.A.onlyB.tooC.thatD.extremely
7.A.shouldB.wereC.getD.could
8.A.constructB.structureC.pieceD.feature
9.A.butB.alsoC.thusD.nevertheless
10.A.solvedB.discoveredC.brokedD.told
11.A.mustB.beenC.wereD.is
12.A.puttingB.pairingC.placingD.preparing
13.A.whileB.whenC.thereforeD.also
14.A.pieceB.typeC.atomD.measure
15.A.fromB.inC.ofD.for
16.A.thenB.soC.byD.that
17.A.fromB.inC.toD.for
18.A.areB.wouldntC.alwaysD.never
19.A.describeB.unitC.mixD.reveal
20.A.differentB.usualC.importantD.chemical
1.【答案】A【解析】根据上文中的heavierandlightergases可以确定本空中应填入“组成的气体”,即constituentgases
2.【答案】C【解析】根据句子意思判断句中的词意为微粒的意思,选项C.tiny合乎题意
3.【答案】D【解析】情态动词must在这里是“必定、必须”的意思
4.【答案】B【解析】sky意为“天空”,atmosphere意为“大气”,oxygen意为“氧气”,environment意为“环境”,只有B项正确
5.【答案】C【解析】这帮助解释了大气组成气体的比例确定原理因为是特指这一原理,用定冠词the
6.【答案】A【解析】onlynecessary的意思是“仅仅是必要”故A正确
7.【答案】D【解析】根据句子意思判断could是“能够”的意思
8.【答案】B【解析】根据句子意思判断这里需要“结构”这个词,而B合乎题意
9.【答案】C【解析】but,nevertheless表示转折意为“但是”,“然而”;thus意为“因此”,如Therehasbeennorain.Thusthecropsarelikelytosuffer.一直没有下雨,因此庄稼可能会受害这里与上文有因果关系,故应选C
10.【答案】A【解析】solve相当于findasolutionorananswerto意为“解决”、“解开”,如:solveaproblemapuzzleamystery;discover相当于findsomethingexistingbutnotknownbefore,意为“发现”,如:discoveraplaceafactthetruth因此应选A
11.【答案】D【解析】因为是表一般规律,又是单数,所以用is这个词
12.【答案】B【解析】Pair这里是“匹配,配成双”的意思
13.【答案】A【解析】while表示对比如Somesubstancesaresolublewhileothersarenot.一些物质是可溶的,而另一些物质是不可溶的
14.【答案】C【解析】根据句子意思判断atom正确
15.【答案】C【解析】of表示“含量,分量”
16.【答案】A【解析】then的意思是nextafterthat
17.【答案】D【解析】for的意思是“对于,就……而言”
18.【答案】C【解析】根据句子意思判断
19.【答案】B【解析】describe意为“描述”;unite意为“结合,合并”;mix意为“不同的东西混合在一起”,如mixflourandwater;reveal意为“揭露,揭示”
20.【答案】A【解析】根据句子意思判断.“成千上万人疯狂下载更多价值连城的绝密英语学习资料,洛基内部秘密英语,技巧,策略请在网上申请报名”。