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
28
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
Theideaofbuilding"NewTowns"toabsorbgrowthisfrequentlyconsideredacure-allforurbanproblems.Itiserroneouslyassu
Theideaofbuilding"NewTowns"toabsorbgrowthisfrequentlyconsideredacure-allforurbanproblems.Itiserroneouslyassu
Behaviorsthatwedonotunderstandoftenbecomenearlyinvisible—evenwhen,inretrospect,weseehowtrulystrangetheyare.
Themoretimescientistsspenddesigningcomputersthemoretheymarvelatthehumanbrain.Tasksthatbaffle(难住)themostadvanc
Thestructureofthisanimal’sbraingivesno______thatitisanymoreintelligentthanothers.
Therearethreeseparatesourcesofhazard【1】totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioactivem
Themostconvincingevidencefortheimportanceofadultinfluenceonachild’sintelligencecomesfromastudyof"atrisk"chi
随机试题
实验室用酸度计和离子计型号很多,但一般均由电极系统和高阻抗毫伏计、待测溶液组成原电池、数字显示器等部分构成的。()
肿瘤的形态学编码的构成是
女性,50岁。发热咳嗽、咳痰3周,近1周来咳大量脓性臭痰,量约300rnl/日。体检:T40℃,右下肺叩呈浊音,可闻及湿啰音,杵状指(+)。应考虑的诊断为
某项目投入总资金1000万元。筹资方案为:银行借款600万元,优先股1007Y元,普通股300万元,其融资成本分别为5%,8%,10%,所得税税率为25%。该项目的税后加权平均资金成本为()。
泡沫灭火系统功能测试的系统喷水试验中用到的工具有()。
商业银行最主要的资金运用是()。
心理咨询师不得因求助者的性别、年龄、职业、民族、国籍、宗教信仰、价值观等任何方面的因素()求助者。
A、 B、 C、 D、 C
"Dimpy,"asherfriendscallher,heardaboutthehazardsofsmokinginhealthclass."Theyshowedpicturesoflungsofpeoplew
武则天,中国历史上唯一的一位女皇帝,于唐朝(theTangDynasty)690年称帝。虽然她很残暴,但是她对国家的统治还是比较成功的。她任人唯贤,完全不考虑其家庭地位。通过奖励积极发展农业的官员,惩罚对农民课征重税的官员,武则天极大地促进了农业的发展
最新回复
(
0
)