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
74
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.
【R10】
选项
答案
place
解析
take place的意思是:发生。空格处的意思是:化学变化时刻都在发生。
转载请注明原文地址:https://kaotiyun.com/show/JsLO777K
0
考博英语
相关试题推荐
Bytheendofthenineteenthcentury,citieswerereimbursingprivatehospitalsfortheircareof______patientsandthepublic
Formultinationalcorporations,taxplanninghasbecomeextremelycomplexaffairs.Ithasbeenstatedthatnomultinationalcorp
TheimagemanyofusmayhaveofalanguageteacherissomeonedrillingaclassroomfullofteenagersinthefinerpointsofFre
Withitspublicationin1885,theConcordPublicLibrarybannedthebookfor"beingmoresuitedtotheslumsthantointelligent
Behaviorsthatwedonotunderstandoftenbecomenearlyinvisible—evenwhen,inretrospect,weseehowtrulystrangetheyare.
Veryoldpeopledoraisemoralproblemsforalmosteveryonewhocomesincontactwiththem.Theirvalues—thiscan’tberepeated
"Youmustalwaysobeyyourparents.""Oh,Imust,______?"
Thequestionsthatthespeakerraisedwerewell______theaverageadult.
Lisastoodmotionlessattheendofthedivingboard,handsathersides,heelsslightlyraised,everymuscle______action.
Withitsstockpricerisingby20percent,thecompanybecomesthesecondmost______technologyfirminthecountry.
随机试题
由比例调节器组成的闭环控制系统是()。
Before______forthejob,youwillberequiredtotakealanguagetest.
酶活性测定中,对米一曼氏常数(Km)的叙述,不正确的是:()
A.外关B.公孙C.列缺D.太渊E.后溪与任脉脉气相通的八脉交会穴是
A.思维奔逸B.思维散漫C.思维贫乏D.思维中断E.思维迟缓以下临床表现属于什么症状患者的言谈缺乏主题,很难让人理解他的用意
建设项目资本金,按照投资主体分为()。
本批货物的唛头是“HYEC8ET74”。( )该批货物向天津海关申报的日期为2005年7月1日。( )
如果要清除单元格中的格式,选定该单元格后,按Delete键即可。()
【2017年上】某初级中学违反国家有关规定向学生收取补课费。依据《中华人民共和国教育法》,有权责令该校退还所收费用的是()。
关于××区××路西延部分道路施工期间禁止通行的通告二○一三年第2号经有关部门批准,××区××路西延部分道路将进行施工。为保证施工期间的道路交通安全与畅通,根据《中华人民共和国
最新回复
(
0
)