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
32
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
Older,lessdogmatictheoriesbetterexplainedhowtheproblemsinthefinancial______draggeddowntherestoftheeconomy.
Formultinationalcorporations,taxplanninghasbecomeextremelycomplexaffairs.Ithasbeenstatedthatnomultinationalcorp
Wal-MartannouncedThursdayafternoonthatitwouldintroduceaprogramnationwidecalled(61)"PickUpToday"thatallowscustome
Wal-MartannouncedThursdayafternoonthatitwouldintroduceaprogramnationwidecalled(61)"PickUpToday"thatallowscustome
______youpromiseyouwillworkhard,______supportyoutocollege.
Everytimeanoldbuildingistorndowninthiscountry,andanewbuildinggoesup,thegroundfloorbecomesabank.There
ManyvisitorspraisedthemagnificentarchitectureofthePalace______theForbiddenCity.
Hershrewdcampaignmanagerswereresponsibleforthefactthatherpoliticalsloganswereactuallyforgottenclichesrevivedan
49TheendofwinteristhemostdangeroustimefortheanimalsinYellowstoneParkasfoodbecomeseven______.
随机试题
劳动争议调解委员会由职工代表、用人单位代表和()组成。
创建窗体的方式不包括()
噎膈发病与下列哪些脏腑有密切关系
摩擦型高强度螺栓连接与承压型高强度螺栓连接主要区别是( )。
甲公司与A公司2016年度有关资料如下:(1)甲公司2016年1月1日发行股票10000万股取得A公司70%的股权,并能够对A公司实施控制。甲公司普通股股票每股面值为1元,发行日每股市价为2.95元,甲公司另支付发行费用500万元。甲公司对A公司投资前所
计算投资方案的增量现金流量时,一般不需要考虑方案()。
人事关系的内容包括()。
一是要逐步建设完整的居民收入统计和住房信息统计系统,为准入与退出机制的设计与运行提供基础数据支撑;二是要加强保障性住房申请、公示、分配等环节的透明度,并实行动态调整与持续跟踪;三是要逐步形成政府监督与社会监督、新闻媒体监督互补、互动的良好局面,确保分配公平
关于故障管理的描述中,错误的是()。
TheordinaryfamilycolonialNorthAmericawasprimarilyconcernedwithsheerphysicalsurvivalandbeyondthat,itsowneconomi
最新回复
(
0
)