首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
In the following text, some sentences have been removed. For Questions 1-5, choose the most suitable one from the list A-G to fi
In the following text, some sentences have been removed. For Questions 1-5, choose the most suitable one from the list A-G to fi
admin
2017-01-17
81
问题
In the following text, some sentences have been removed. For Questions 1-5, choose the most suitable one from the list A-G to fit into each of the numbered blanks. There are two extra choices, which do not fit in any of the blanks.
Long before Man lived on the Earth, there were fishes, reptiles, birds, insects, and some mammals. Although some of these animals were ancestors of kinds living today, others are now extinct, that is, they have no descendants alive now.【C1】______
Very occasionally the rocks show impression of skin, so that, apart from color, we can build up a reasonably accurate picture of an animal that died millions of years ago. That kind of rock in which the remains are found tells us much about the nature of the original land, often of the plants that grew on it, and even of its climate.
【C2】______Nearly all of the fossils that we know were preserved in rocks formed by water action, and most of these are of animals that lived in or near water. Thus it follows that there must be many kinds of mammals, birds, and insects of which we know nothing.
【C3】______ There were also crablike creatures, whose bodies were covered with a horny substance. The body segments each had two pairs of legs, one pair for walking on the sandy bottom, the other for swimming. The head was a kind of shield with a pair of compound eyes, often with thousands of lenses. They were usually an inch or two long but some were 2 feet.
【C4】______Of these, the ammonites are very interesting and important. They have a shell composed of many chambers, each representing a temporary home of the animal. As the young grew larger it grew a new chamber and sealed off the previous one. Thousands of these can be seen in the rocks on the Dorset Coast.
【C5】______
About 75 million years ago the Age of Reptiles was over and most of the groups died out. The mammals quickly developed, and we can trace the evolution of many familiar animals such as the elephant and horse. Many of the later mammals though now extinct, were known to primitive man and were featured by him in cave paintings and on bone carvings.
[A] The shellfish have a long history in the rock and many different kinds are known.
[B] Nevertheless, we know a great deal about many of them because their bones and shells have been preserved in the rocks as fossils, from them we can tell their size and shape, how they walked, the kind of food they ate.
[C] The first animals with true backbones were the fishes, first known in the rocks of 375 million years ago. About 300 million years ago the amphibians, the animals able to live both on land and in water, appeared. They were giant, sometimes 8 feet long, and many of them lived in the swampy pools in which our coal seam, or layer is formed. The amphibians gave rise to the reptiles and for nearly 150 million years these were the principal forms of life on land, in the sea, and in the air.
[D] The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large over large areas of the world.
[E] The earliest animals whose remains have been found were all very simple kinds and lived in the sea. Later forms are more complex, and among these are the sea-lilies, relations of the star-fishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks.
[F] When an animal dies, the body, its bones, or shell, may often be carried away by streams into lakes or the sea and there get covered up by mud. If the animal lived in the sea its body would probably sink and be covered with mud. More and more mud would fall upon it until the bones or shell become embedded and preserved.
[G] Many factors can influence how fossils are preserved in rocks. Remains of an organism may be replaced by minerals, dissolved by an acidic solution to leave only their impression, or simply reduced to a more stable form.
【C5】
选项
答案
C
解析
文章前面几段讲的都是动物不断进化的过程,而下文中的时间状语About 75 million years ago the Age of Reptiles was over表明文章对地球上动物进化过程的描写很有可能是按照时间顺序,因此本题所在的段落和下面的段落很可能存在时间上的延续关系,即本题所在的段落很可能会提到比75 million years ago更早的时间。通过对比选项可知C项中的两个表示时间的短语375 million years和150 million years和下一个段落中提到的时间状语具有了延续性,是正确答案。此外,划线处后的About 75 million years ago the Age of Reptiles was over and most of the groups died out中的Reptile在前文中从没有提到,在下文中又没有作为新信息,因而正确答案的选项中一定有这个词。只有C项中有The amphibians gave rise to the reptiles for nearly 1 50 million years these were the principal forms of life on land,in the sea,and in the sea,and in the air,所以正确答案只能是C项。
转载请注明原文地址:https://kaotiyun.com/show/pnEZ777K
0
考研英语一
相关试题推荐
Technologyissupposedtomakeourliveseasier,allowingustodothingsmorequicklyandefficiently.Buttoooftenitseemst
Inthissection,youareaskedtowriteanessaybasedonthefollowinginformation.Makecommentsandexpressyourownopinion.
Ifyouhavehighbloodpressure,you’reingood【C1】______.Hypertensionaffects67millionAmericans,includingnearlytwo-third
Asimpleideasupportsscience:"trust,butverify".Resultsshouldalwaysbe【C1】______tochallengefromexperiment.Thatsimple
Asimpleideasupportsscience:"trust,butverify".Resultsshouldalwaysbe【C1】______tochallengefromexperiment.Thatsimple
Asimpleideasupportsscience:"trust,butverify".Resultsshouldalwaysbe【C1】______tochallengefromexperiment.Thatsimple
Notsolongago,itwasthestuffofnightmares:youpickupthelandlinetelephoneandthere’snodialingtone.Nothing.Theph
ScientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteriaTheChineseresea
Airpollutionkilledaboutsevenmillionpeoplelastyear,makingittheworld’ssinglebiggestenvironmentalhealthrisk,theW
随机试题
A、氯丙嗪B、水杨酸钠C、卡那霉素D、巴比妥E、胍乙啶与体内血浆蛋白极少结合的药物是()
患者,女,52岁。诊断为2型糖尿病。与该患者临床特征相符的表现是
注册商标有效期满,需要继续使用的,应当在期满前______内申请续展注册;在此期间未能提出申请的,可以给予______的宽展期。宽展期满仍未提出申请的,注销其注册商标。()
中央银行降低再贴现率,将使货币供应量减少。()
属于我国政府收入中的非税收入项目是()。
下列法律事实中,属于法律事件的是( )。
当代社会,提高自我修养的正确途径有()。
某餐厅设有可坐12人和可坐10人两种规格的餐桌共28张,最多可容纳332人同时就餐,问该餐厅有几张10人桌?
Thevalueof______mid-sizedcarsthatgetgoodmileagehassoaredalongsidetherisingpriceofgasoline.
A、 B、 C、 C提问价格(Howmuch),因此提到“询问一下”的选项(C)为正确答案。如果只听到问题中的chairs就选择(A)“请坐”为答案,是不正确的,另外不要把问题中的doyouthink和答案中的I
最新回复
(
0
)