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
2011-04-26
71
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
以往浇灌过的成千上万英亩的庄稼地受到风和杂草的侵袭。由于耕种和过度放牧的缘故,数百万英亩的天然牧场正以惊人的速度遭到侵蚀,总共约有二亿二千五百万英亩的土地正经受着严重的沙漠化。
解析
转载请注明原文地址:https://kaotiyun.com/show/XE6O777K
0
考博英语
相关试题推荐
Readthearticlebelowaboutproblemsindoinginternationaltrade.Foreachquestion(23-28),choosethecorrectanswer.Mark
Readtheinformationaboutthecommunicationofinformationinbusiness.ChoosethecorrectwordtofilleachgapfromA,BorC
Readthearticlebelowaboutproblemsindonginternationaltrade.Foreachquestion23-28ontheoppositepage,choosethe
Readthearticlebelowaboutproblemsindonginternationaltrade.Foreachquestion23-28ontheoppositepage,choosethe
•Readthearticleaboutthefutureoftheairlineindustry.•Choosethebestwordtofillineachgap,fromA,BorC.•Fore
AimsofAssetManagementAimofassetmanagementistoachievegreatesteffectivenessandprofitabilityfromproductionand
青少年人格上的缺陷反映的是教育思想和教育观念的偏差,而教育思想和教育观念的偏差往往又与传统文化观念上的误区相对应。
很多移居城市的人虽然在报酬低、没有什么保障的非正式行业工作,但调查表明,迁移到城市确实改善了他们的生活境况,而且,他们对城市的经济发展起到了重要作用。
Whatheexpressedasameresuppositionwastakenbyothersasapositivestatement.
AnotherexampleoftheexerciseofpowerbyCongresswastheactionittookduringtheReconstructionPeriodaftertheCivilWar
随机试题
利用普通网民的上传行为来积累数字资源的信息内容获取方法是()。
肝硬化病人引起肝肾综合征的因素中,下列哪项不正确
常引起动物化脓的病原是()。
胎黄湿热熏蒸证的治法是胎黄寒湿阻滞证的治法是
根据《药品管理法实施条例》,包装不符合规定的中药饮片,生产企业
在不违反法律的强制性规定下,合同的内容由当事人约定,一般包括()。
下列各项中,影响企业当期营业利润的有()。
单位的工资、奖金等现金的支取可以通过一般存款账户办理。()
在IPSec协议族中,有两个主要的协议,分别是______协议和身份认证头协议。
Hecouldn’t______hiscuriositytoseewhatwasinthebox.
最新回复
(
0
)