老托福阅读真题PASSAGE 27-智课教育旗下智课教育.pdf

智 课 网 托 福 备 考 资 料老托福阅读真题PASSAGE 27-智课教育旗下智课教育本文和大家分享的是老托福阅读真题PASSAGE 27，练习真题是最重要也最有效的复习方法，大家在复习托福阅读考试的时候一定要对真题重视起来。托福阅读 的思维方式就是托福阅读的出题方式，只有掌握了这种思维方式，才有可能在做题之前，预测到新托福阅读题的出题形式和特点，为找答案节省时间。老托福阅读试题的核心价值，在于其最贴近真题的阅读思维方式。此外老托福阅读真题比新托福IBT阅读文章要短，比较容易适应。这也是大家在备考托福的时候非常重要的一点。因为前期的入手如果能从容易的开始，就会形成一个循序渐进的过程方式，让大家的练习有一个提高的过程。既然老托福阅读试题有这样的效果，那我们如何利用那有限的真题来达到锻炼自己的目的呢？事实上这就一个办法，就是坚持。本期为大家推荐老托福阅读的真题PASSAGE27，附有原文及答案，希望对托福考生备考有所帮助。The mineral particles found in soil range in size frommicroscopic clay particles to large boulders.The most abundantparticlessand,silt,and clayare the focus of examination instudies of soil texture.Texture is the term used to describe thecomposite sizes of particles in a soil sample,typically severalrepresentative handfuls.To measure soil texture,the sand,silt,and clay particles aresorted out by size and weight.The weights of each size are thenexpressed as a percentage of the sample weight.In the field,soiltexture can be estimated by extracting a handful of soil andsqueezing the damp soil into three basic shapes;(1)cast,a lumpformed by squeezing a sample in a clenched fist;(2)thread,apencil shape formed by rolling soil between the palms;and(3)ribbon,a flatfish shape formed by squeezing a small samplebetween the thumb and index finger.The behavioralcharacteristics of the soil when molded into each of theseshapes,if they can be formed at all,provide the basis for ageneral textural classification.The behavior of the soil in thehand test is determined by the amount of clay in the sample.Clay particles are highly cohesive,and when dampened,behaveas a plastic.Therefore the higher the clay content in a sample,the more refined and durable the shapes into which it can bemolded.Another method of determining soil texture involves the useof devices called sediment sieves,screens built with a specifiedmesh size.When the soil is filtered through a group of sieves,each with a different mesh size,the particles become grouped incorresponding size categories.Each category can be weighed tomake a textural determination.Although sieves work well for silt,sand,and larger particles,they are not appropriate for clayparticles.Clay is far too small to sieve accurately;therefore,insoils with a high proportion of clay,the fine particles aremeasured on the basis of their settling velocity when suspendedin water.Since clays settle so slowly,they are easily segregatedfrom sand and silt.The water can be drawn off and evaporated,leaving a residue of clay,which can be weighed.1.What does the passage mainly discuss?(A)Characteristics of high quality soil(B)Particles typically found in most soils(C)How a high clay content affects the texture of soil(D)Ways to determine the texture of soil2.The author mentions several representative handfuls inline 4 in order to show(A)the range of soil samples(B)the process by which soil is weighed(C)the requirements for an adequate soil sample(D)how small soil particles are weighted3.The phrase sorted out in line 5 is closest in meaning to(A)mixed(B)replaced(C)carried(D)separated4.It can be inferred that the names of the three basic shapesmentioned in paragraph 2 reflect(A)the way the soil is extracted(B)the results of squeezing the soil(C)the need to check more than one handful(D)the difficulty of forming different shapes5.The word dampened in line 14 is closest in meaning to(A)damaged(B)stretched(C)moistened(D)examined6.Which of the following can be inferred from the passageabout a soil sample with little or no clay in it?(A)It is not very heavy.(B)It may not hold its shape when molded.(C)Its shape is durable(D)Its texture cannot be classified7.The word they in line 21 refers to(A)categories(B)sieves(C)larger particles(D)clay particles8.It can be inferred from the passage that the sedimentsieve has an advantage over the hand test in determining soiltexture because(A)using the sieve takes less time(B)the sieve can measure clay(C)less training is required to use the sieve(D)the sieve allows for a more exact measure9.During the procedure described in paragraph 3,when clayparticles are placed into water they(A)stick to the sides of the water container(B)take some time to sink to the bottom(C)separate into different sizes(D)dissolve quickly10.The word fine in line 24 is closest in meaning to(A)tiny(B)many(C)excellent(D)various11.All of the following words are defined in the passageEXCEPT(A)texture(line 3)(B)ribbon(line 10)(C)sediment sieves(line 18)(D)evaporated(line 25)正确答案：DADBC BBDBA D以上就是智课教育为大家整理的老托福阅读真题，考生可进行参考训练以提高自己的考试水平。若您想了解托福考试更多相关信息请关注智课教育。