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成人英语三级测验教导习题完形填空操练

时候:2024-09-20 20:54:15 学位英语 我要投稿
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成人英语三级测验教导习题完形填空操练

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成人英语三级测验教导习题完形填空操练

  Dalton wondered why the heavier and lighter gases in the atmosphere did not separate as oil and water do.He finally concluded that the constituent 1 must exist in the form of 2 particles or atoms and that these 3 be completely mixed together in the 4 .This threw a new light in 5 laws of definite proportions.It was 6 necessary to suppose that the atoms 7 combinesintossmall groups of uniform 8 and so form more complex substance; 9 the mystery of this law was 10 .Dalton suggested, for example, that carbon monoxide 11 formed by the one with one 12 of atoms of carbon and oxygen, 13 carbon dioxide results from a single 14 of carbon uniting with two atoms 15 oxygen.Assuming this to be true, 16 the definite proportions of Prout's law ( 17 all chemical compounds the different constituents 18 enter in unvarying proportions) would naturally 19 the relative weights of the many 20 kinds of atoms.

  1.A.gases B.pieces C.things D.gas

  2.A.timely B.trimmed C.tiny D.topical

  3.A.ought B.could C.will D.must

  4.A.sky B.atmosphere C.oxygen D.environment

  5.A.various B.many C.the D.those

  6.A.only B.too C.that D.extremely

  7.A.should B.were C.get D.could

  8.A.construct B.structure C.piece D.feature

  9.A.but B.also C.thus D.nevertheless

  10.A.solved B.discovered C.broked D.told

  11.A.must B.been C.were D.is

  12.A.putting B.pairing C.placing D.preparing

  13.A.while B.when C.therefore D.also

  14.A.piece B.type C.atom D.measure

  15.A.from B.in C.of D.for

  16.A.then B.so C.by D.that

  17.A.from B.in C.to D.for

  18.A.are B.wouldn?t C.always D.never

  19.A.describe B.unit C.mix D.reveal

  20.A.different B.usual C.important D.chemical

  参考谜底

  1.【谜底】A

  【剖析】按照上文中的heavier and lighter gases可以或许肯定,本空中应填入“构成的气体”,即constituent gases.

  2.【谜底】C

  【剖析】按照句子意义判定,句中的词意为微粒的'意义,选项C.tiny符合题意。

  3.【谜底】D

  【剖析】神态动词must在这里是“肯定、必须”的意义。

  4.【谜底】B

  【剖析】sky意为“天空”,atmosphere意为“大气”,oxygen意为“氧气”,environment意为“情况”,只要B项准确。

  5.【谜底】C

  【剖析】这赞助诠释了大气构成气体的比例肯定道理。由于是特指这一道理,用定冠词the.

  6.【谜底】A

  【剖析】only necessary的意义是“仅仅是须要”。故A准确。

  7.【谜底】D

  【剖析】按照句子意义判定,could是“可以或许”的意义。

  8.【谜底】B

  【剖析】按照句子意义判定,这里须要“布局”这个词,而B符合题意。

  9.【谜底】C

  【剖析】but,nevertheless表现转机意为“可是”,“但是”;thus意为“是以”,如There has been no rain.Thus, the crops are likely to suffer.一向不下雨,是以庄稼能够会受益。这里与上文有因果干系,故应选C.

  10.【谜底】A

  【剖析】solve相称于find a solution or an answer to,意为“处理”、“解开”,如:solve a problem (a puzzle, a mystery);discover相称于find something existing but not known before,意为“发明”,如: discover a place (a fact, the truth)。是以应选A.

  11.【谜底】D

  【剖析】由于是表普通纪律,又是双数,以是用is这个词。

  12.【谜底】B

  【剖析】Pair这里是“婚配,配成双”的意义。

  13.【谜底】A

  【剖析】while表现对照。如:Some substances are soluble, while others are not.一些物资是可溶的,而另外一些物资是不可溶的。

  14.【谜底】C

  【剖析】按照句子意义判定,atom准确。

  15.【谜底】C

  【剖析】of表现“含量,份量”。

  16.【谜底】A

  【剖析】then的意义是next,after that.

  17.【谜底】D

  【剖析】for的意义是“对,就……而言”。

  18.【谜底】C

  【剖析】按照句子意义判定。

  19.【谜底】B

  【剖析】describe意为“描写”;unite意为“连系,归并”;mix意为“(差别的工具)夹杂在一路”,如:mix flour and water;reveal意为“揭穿,揭露”。

  20.【谜底】A

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