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雅思阅览标题涉及到的类型许多，许多第一次参加雅思考试的同学可能会感觉复习起来有些头痛，找不到侧重点。辛达雅思代报小编依据剑桥雅思真题的标题，

为大家整理了剑桥雅思阅览题型分类练习解析：小标练习题4，期望对各位同学的雅思备考有所协助：

17.答案：i The results of the research intoblood-variants

原文：. They found that their Gm allotypes could be divided into two…. ; Fromthis evidence it was deduced that there had been three major waves of 

migrationacross the Bering Strait. The first…….

同义替换：results = found, it was deduced that

18.答案：vi Further genetic evidencerelating to the three-wave theory

原文：How for does other research support these conclusions? GeneticistDouglas Wallace has studied mitochondrial DNA...... ; As would have beenpredicted 

by Robert Williams's work, all three groups appear to be descendedfrom the same ancestral (Paleo-lndian) population.

同义替换：Further evidence = other research support ;genetic = DNA  

19.答案：ii Dental evidence

原文：There are two other kinds of research that have thrown some light onthe origins of the Native American population; they involve the study of teethand 

of languages. The biological anthropologist Christy Turner is an expert inthe analysis of changing physical characteristics in human teeth.

同义替换：dental = human teeth ; evidence = have thrownsome light on

[C8T1P2-P22]

14.答案：ii Aviation disaster prompts action

原文：An accident that occurred in the skies over the Grand Canyon in 1956resulted in the establishment of the Federal Aviation Administration (FAA) 

toregulate and oversee the operation of aircraft in the skies over the UnitedStates, which were becoming quite congested.

同义替换：Aviation disaster = An accident that occurredin the skies over the Grand Canyon ; prompts = resulted in ; action = theestablishment of the 

Federal Aviation Administration (FAA)

15.答案：iii Two coincidental developments

原文：It was only after the creation of the FAA that full-scale regulation ofAmerica's airspace took place, and this was fortuitous, for the advent of thejet 

engine suddenly resulted in a large number of very fast planes

同义替换：coincidental = fortuitous ; two developments= full-scale regulation of America's airspace took place, jet engine suddenlyresulted in a large number 

of very fast planes

16.答案：v An oversimplified view

原文：Many people think that…….This is a very incomplete part of the picture.

同义替换：oversimplified = incomplete part ; view =think

17.答案：iv Setting altitude zones

原文：In general, from 365m above the ground and higher, …….; controlledairspace extends down to 215m above the ground, and, in the immediate 

vicinityof an airport, all the way down to the surface. …..Elsewhere, in uncontrolledairspace, pilots are bound by fewer regulations…..

同义替换：latitude zones = 365m above, down to 215m,immediate vicinity of, uncontrolled airspace…

小编找到的是作者的一些见解，希望可以为考生们寻找到最好得分方式，也希望对大家有所帮助。最后，希望广大考生们在备考过程中提升自己的语言水平，取得更好的成绩。

有需要代报考位的同学们，可以直接联系我们，辛达雅思代报竭诚为您服务。(*^__^*)