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
Every geologist is familiar with the erosion cycle. No sooner has an area of land been raised alive sea-level than it becomes s
Every geologist is familiar with the erosion cycle. No sooner has an area of land been raised alive sea-level than it becomes s
admin
2013-11-29
37
问题
Every geologist is familiar with the erosion cycle. No sooner has an area of land been raised alive sea-level than it becomes subject to the erosive forces of nature. The rain beats down on the ground and washed【51】the finer particles, sweeping them into rivulets and then into rivers and out to sea. The frost freezes the rain water in cracks of the rocks and breaks【52】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【53】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【54】course protected by soil itself dependent initially on the weathering of the rocks. Slowly【55】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 held together by the growth of vegetation. Grass and herbaceous plants,【56】long, branching tenuous roots, hold firmly together the surface particles. The【57】is true with the forest cover. The heaviest tropical down- pours beating on the leave of the giant trees reach the ground only【58】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【59】leaves and decaying vegetation into humus and food for the growing plants. Chemical action is constantly taking【60】. Soil acids attack mineral particles and salts in solution move from one layer in the soil to another.
选项
答案
away
解析
wash sb. /sth. away(指水)将某人、某物冲掉或冲至另一处。
转载请注明原文地址:https://kaotiyun.com/show/tmhO777K
0
考博英语
相关试题推荐
Oldpeoplearealwayssayingthattheyoungpeoplearenot【51】theywere.Thesamecommentis【52】fromgenerationtogenerationan
Oldpeoplearealwayssayingthattheyoungpeoplearenot【51】theywere.Thesamecommentis【52】fromgenerationtogenerationan
Oldpeoplearealwayssayingthattheyoungpeoplearenot【51】theywere.Thesamecommentis【52】fromgenerationtogenerationan
Oldpeoplearealwayssayingthattheyoungpeoplearenot【51】theywere.Thesamecommentis【52】fromgenerationtogenerationan
Aboutadecadeago,then-RepublicanHouseleaderNewtGingrichraisedabigstirwhenheimpliedthatamother’sdrowningofher
MenhaveoftenbeenpraisedbybeingtoldthattheywereassmartasaPhiladelphialawyer.Nooneknowswhythereissomething
MenhaveoftenbeenpraisedbybeingtoldthattheywereassmartasaPhiladelphialawyer.Nooneknowswhythereissomething
AlthoughtheArabcutbacksrepresentedalossoflessthan7percentinworldsupply,theycreatedpaniconthepartofoilcompa
Stratford-on-Avon,asweallknow,hasonlyoneindustry—WilliamShakespeare—buttherearetwodistinctlyseparateandincre
Theevolutionofsexratioshasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesa
随机试题
______,youcannotfinishthebookintwodays.
心肌细胞内外K+浓度比值静息电位负值心肌兴奋性 A.↑↑↓ B.↓↓↓ C.↓↓↑ D.↑↓↑ E.↓↑↑重度高钾血症时
卫生学上要求,冬季一天内室内日照时数不能少于
桂枝治疗风寒表虚证,宜配伍的是
下列说法错误的是()。
从事证券业务的专业人员包括()。Ⅰ.证券公司中从事自营、经纪、承销、投资咨询、受托投资管理等业务的专业人员Ⅱ.基金管理公司、基金托管机构中从事基金销售、研究分析、投资管理、交易、监察稽核等业务的专业人员Ⅲ.证券投资咨询机构中从事证
张三从李四处购买一部手机,约定一周后张三将手机的价款直接转给赵二。一周后,张三未支付手机价款,经赵二催告后仍未支付。根据合同法律制度的规定,下列有关承担违约责任的说法中,正确的是()。
(2013年真题)下列各选项中,以六部官制作为分篇体例的国家律典有
下列合同的效力属于部分有效、部分无效的是()。
TheorganizationbehindtheLawSchoolAdmissionTestreportedthatthenumberoftestsitadministeredthisyeardroppedbymor
最新回复
(
0
)