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
Desertification in the arid United Statse is flagrant. Groundwater supplies beneath vast stretches of land are dropping precipit
Desertification in the arid United Statse is flagrant. Groundwater supplies beneath vast stretches of land are dropping precipit
admin
2013-01-20
53
问题
Desertification in the arid United Statse is flagrant. Groundwater supplies beneath vast stretches of land are dropping precipitously. Whole river systems have dried up. Others are chocked with sediment washed from denuded land. 21.
Hundreds of thousands of acres of previously irrigated cropland have been abandoned to wind or weeds. Several million acres of natural grassland are eroding at unnaturally high rates as a result of cultivation or overgrazing. All told, about 225 million acres of land are undergoing severe desertification.
22.
Federal subsidies encourage the exploitation of arid land resources. Low-interest loans for irrigation and other water delivery systems encourage farmers, industry, and municipalities to mine groundwater. Federal disaster relief and commodity programs encourage arid-land farmers to plow up natural grassland to plant crops such as wheat and, especially cotton. Federal grazing fees that are well below the free market price encourage overgrazing of the commons.
The market, too, provides powerful incentives to exploit arid land resources beyond their carrying capacity. 23.
When commodity prices are high relative to the farmer’s or rancher’s operating costs, the return on a production-enhancing investment is invaribly greater than the return on a conservation investment. And when commodity prices are relatively low, arid land ranchers and farmers often have to use all their available financial resources to stay solvent.
24.
If the United States is, as it appears, well on its way toward overdrawing the arid land resources, then the policy choice is simply to pay now for the appropriate remedies or pay far more later, when productive benefits from arid land resources have been both realized and largely terminated.
选项
答案
联邦的补贴鼓励利用干旱的土地资源。为灌溉和供水系统而发放的低息贷款鼓励农场主、企业和市政当局开采地下水。联邦赈灾及商品计划鼓励干旱地区的农场主深耕天然牧场,在上面种植小麦,尤其是种棉花。远远低于自由市场价的联邦放牧费鼓励对公地进行过度放牧。
解析
转载请注明原文地址:https://kaotiyun.com/show/ca2O777K
0
考博英语
相关试题推荐
Futuristshaveidentifiedtwochangesthatseemtobecentraltocontemporarysociallife.First,theUnitedStatesisbeingres
Sometimesthestudentmaybeaskedtowriteabouthis______toacertainbookorarticlethathassomebearingonthesubjectbei
Therecenteconomiccrisishasbroughtabouta______inworldtrade.
TheEuropeanCommissionissueda_____decisiononOct.29permittinganalliancebetweenUnitedAirlines,DeutscheLufthansaandS
A、contractB、peaceC、ceasefireD、treatyC本题考核的知识点是:对应成分分析一and对应。and前后性质相同,and后面是agreedtoavoteonthefutureoftheterritory,所
Idon’tmindabitifyoubringyourfriendsinforadrink,butitisrathertoomuchwhentenpeoplearrive____fordinner.
Beforethemid-nineteenthcentury,peopleintheUnitedStateeatmostfoodsonlyinseason.Drying,smoking,andsaltingcould
Everymorning,Alliewakesupandaccompaniesherfriendtothewashroom.Sheturnsonthelight,soapsupawashcloth,andbegi
Directadvertingincludesallformsofsalesappeals,mailed,delivered,orexhibiteddirectlytotheprospectivebuyerofanad
Bothdog’sdietandstructureare______tothoseofthehumanbeing,andsoithasbeenthesubjectofcountlessdemonstrationsa
随机试题
“人类是一件多么了不起的杰作!多么高贵的理性!多么伟大的力量!多么优美的仪表!多么文雅的举动!在行动上多么像一个天使!在智慧上多么像一个天神,宇宙的精华,万物的灵长!”对人类作如此赞叹的人物是()
负债资金可通过()
A.氢氧化铝一镁乳合剂B.雷尼替丁C.次枸橼酸D.奥美拉唑(洛赛克)E.硫糖铝餐前半小时服用()
在价值工程研究对象彼此相差较大且时间紧迫的情况下,确定价值工程研究对象可选用的方法是()。
阅读下面材料,根据要求写作文。教育学家陶行知说过:处处是想象创造之地,天天是想象创造之时,人人是想象创造之人,而儿童是新时代的创造者,要注重解放儿童的想象创造力。教育进展国际评估组织,曾对全球21个国家进行了一个调查,结果显示,中国孩子
成功的理想目标往往不是成功的现实目标,结合你自己谈谈看法。
在对待社会历史发展及其规律问题上,存在着两种根本对立的观点,它们是()
二阶常系数非齐次线性微分方程y″-2y′-3y=(2x+1)e-x的特解形式为().
有如下程序段:inti=0,j=1;nt&r=i;//①r=j;//②int*p=&i;//③*p=&r;//④其中会产生编译错误的语句是()。
Heneedstoputthefinal______tohisspeechbeforegoingbacktothedormtonight.
最新回复
(
0
)