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
外语
Even geologist is familiar with the erosion cycle. No sooner has an area of land been raised above sea-level than it becomes sub
Even geologist is familiar with the erosion cycle. No sooner has an area of land been raised above sea-level than it becomes sub
admin
2015-01-09
52
问题
Even geologist is familiar with the erosion cycle. No sooner has an area of land been raised above sea-level than it becomes subject to the erosive forces of nature. The rain beats down on the ground and washed【R1】______the finer particles,sweeping them into rivulets and them into rivers and out to sea. The frost freezes the rain water in cracks of the rocks and breaks【R2】______even the hardest of the constituents of the earth’s crust. Blocks of rock dislodged at high levels are brought down by the force of gravity. Alternate heating and【R3】______of bare rock surfaces causes their disintegration. In the dry regions of the world the wind is a powerful force in removing material from one area to another. All this is natural. But nature has also provided certain defensive forces. Bare rock surfaces are in【R4】______course protected by soil,itself de-pendent initially on the weathering of the rocks. Slowly【R5】______surely,different types of soil with differing ’profiles’evolve the main types depending primarily on the climate. The protective soil covering,once it is formed,is hold together by the growth of vegetation. Grass and herbaceous plants, 【R6】______long,branching tenuous roots,hold firmly together the surface particles. The【R7】______is true with the forest cover. The heavi-est tropical downpours beating on the leaves of the giant trees reach the ground only【R8】______spray,gently watering the surface layers and penetrating along the long passages provided by the roots to the lower levels of the soil. The soil,thus protected by grass,herb,or trees,furnishes a quiet habitat for a myriad varied organisms—earth-worms that importantly modify the soil,bacteria,active in their work of converting【R9】______leaves and decaying vegetation into humus and food for the growing plants. Chemical action is con-stantly taking【R10】______;soil acids attack mineral particles and salts in solution move from one layer in the soil to another.
【R1】
选项
答案
away
解析
wash away的意思是“扫除,清除”。空格处的意思是:落到地面上的雨水冲走了细小的微尘,把它们冲进了涓涓细流,又把它们带进河流,最后注入到大海。
转载请注明原文地址:https://kaotiyun.com/show/VsLO777K
0
考博英语
相关试题推荐
Formultinationalcorporations,taxplanninghasbecomeextremelycomplexaffairs.Ithasbeenstatedthatnomultinationalcorp
Wal-MartannouncedThursdayafternoonthatitwouldintroduceaprogramnationwidecalled(61)"PickUpToday"thatallowscustome
Wal-MartannouncedThursdayafternoonthatitwouldintroduceaprogramnationwidecalled(61)"PickUpToday"thatallowscustome
Wal-MartannouncedThursdayafternoonthatitwouldintroduceaprogramnationwidecalled(61)"PickUpToday"thatallowscustome
Theideaofbuilding"NewTowns"toabsorbgrowthisfrequentlyconsideredacure-allforurbanproblems.Itiserroneouslyassu
Competentstudentsarethosewhocanseetheapplicationofatheoryoraconcepttoaspecific______example.
Therearethreeseparatesourcesofhazard【1】totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioactivem
Thepolicearedoingallhecantobringthoseresponsibleforthebombingto
Themostconvincingevidencefortheimportanceofadultinfluenceonachild’sintelligencecomesfromastudyof"atrisk"chi
Themostconvincingevidencefortheimportanceofadultinfluenceonachild’sintelligencecomesfromastudyof"atrisk"chi
随机试题
PASSAGETHREEWhatdoestheword"havoc"inthethirdparagraphmean?
关子伤寒的临床表现哪项是正确的()
A.单纯扩散方式B.易化扩散C.人胞作用D.原发性主动转运E.继发性主动转运二氧化碳和氧气跨细胞膜转运的过程是
一般说来,初痢实则()
在下列关于路堤边坡的说法中,()种说法是正确的。
下列叙述中,符合建设工程定额定义的有( )。
农业结构性矛盾突出表现为()。
要求獐子岛上市公司和其聘请的大华会计师事务所交出8亿扇贝尸体的都是獐子岛投资者,大华会计师事务所没有一名会计师投资过獐子岛。有的网友认为没有尸体无法计算损失,要求必须交出扇贝尸体;有的网友则认为这纯属“黑天鹅事件”,不能也拒绝提出这种荒唐要求。如果上述断
HowoldisXiaoZhang?
Naturalflavoringsandfragrancesareoftencostlyandlimitedinsupply.Forexample,thevitalingredientinarosefragrance
最新回复
(
0
)