GMAT考试阅读理解练习题
笔译GMAT考试阅读理解练习题2017
在练习中自己总结出考试出题规律，比听别人讲更牢固。下面是店铺整理的GMAT阅读理解练习题，欢迎阅读!
In choosing a method for determining climatic conditions that existed in the past， paleoclimatologists invoke four principal criteria. First， the material---rocks， lakes， vegetation， etc—on which the method relies must be (5) widespread enough to provide plenty of information，since analysis of material that is rarely encountered will not permit correlation with other regions or with other periods of geological history. Second， in the process of formation， the material must have received an environ-(10) mental signal that reflects a change in climate and that can be deciphered by modern physical or chemical means. Third， at least some of the material must have retained the signal unaffected by subquent changes in the environment. Fourth， it must be possible to deter-(15) mine the time at which the inferred climatic conditionsheld. This last criterion is more easily met i
n dating marine diments， becau dating of only a small number of layers in a marine quence allows the age of other layers to be estimated fairly reliably by extrapola-(20) tion and interpolation. By contrast， becau dimentation is much less continuous in continental regions， estimating the age of a continental bed from the known ages of beds above and below is more risky.
One very old method ud in the investigation of past (25) climatic conditions involves the measurement of water levels in ancient lakes. In temperate regions， there areenough lakes for correlations between them to give us a reliable picture. In arid and miarid regions， on the other hand， the small number of lakes and the great (30) distances between them reduce the possibilities for correlation. Moreover， since lake levels are controlled by rates of evaporation as well as by precipitation， the interpretation of such levels is ambiguous. For instance， the fact that lake levels in the miarid southwestern United (35) States appear to have been higher during the last ice age than they are now was at one time attributed to incread precipitation. On the basis of snow-line elevations， however， it has been concluded that the climatethen was not necessarily wbounce是什么意思
etter than it is now， but rather (40) that both summers and winters were cooler， resulting in reduced evaporation.
第一名英文Another problematic method is to reconstruct former climates on the basis of pollen profiles. The type of vegetation in a specific region is determined by identifying (45) and counting the various pollen grains found there.Although the relationship between vegetation and climate is not as direct as the relationship between climate and lake levels， the method often works well inthe temperate zones. In arid and miarid regions in (50) which there is not much vegetation， however， small changes in one or a few plant types can change the picture dramatically， making accurate correlations between neighboring areas difficult to obtain.
1. Which of the following statements about the difference between marine and continental dimentation is supported by information in the passage?
中考英语试题
(A) Data provided by dating marine dimentation is more consistent with rearchers’ findings in other disciplines than is data provided by dating continental dimentation.
(B) It is easier to estimate the age of a layer in a quence of continental dimentation than it is to estimate the age of a layer in a quence of marine dimentation.
英语散文
(C) Marine dimentation is much less widespread than continental dimentation.
(D) Rearchers are more often forced to rely on extrapolation when dating a layer of marine dimentation than when dating a layer of continental dimentation.
(E) Marine dimentation is much more continuous than is continental dimentation.
不公平英语2. Which of the following statements best describes the organization of the passage as a whole?
(A) The author describes a method for determining past climatic conditions and then offers specific examples of situations in which it has been ud.
鸠集凤池
(B) The author discuss the method of dating marine and continental quences and then explains how dating is more difficult with lake levels than with pollen profiles.
学位英语考试试题
(C) The author describes the common requirements of methods for determining past climatic conditions and then discuss examples of such methods.
(D) The author describes various ways of choosing a material for determining past climatic conditions and then discuss how two such methods have yielded contradictory data.
(E) The author describes how methods for determining past climatic conditions were first developed and then describes two of the earliest known methods.ssti
3. It can be inferred from the passage that paleoclimatologists have concluded which of the following on the basis of their study of snow-line elevations in the southwestern United States?
(A) There is usually more precipitation during an ice age becau of incread amounts of evaporation.
(B) There was less precipitation during the last ice age than there is today.
