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
74
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
照目前的样子,如果说美国正透支干旱地区的土地资源,那么应作出的决策是现在要为适当的补救措施付出代价,甚至往后还要付出更大的代价,因为从干旱的土地资源中获得的生产性利润不仅已经实现,而且在很大的程度上走向枯竭。
解析
转载请注明原文地址:https://www.kaotiyun.com/show/Ma2O777K
0
考博英语
相关试题推荐
Futuristshaveidentifiedtwochangesthatseemtobecentraltocontemporarysociallife.First,theUnitedStatesisbeingres
Hewasbusywritingtheessayallthemorning,only_____occasionallytohaveacupoftea.
LastyearFrenchdriverskilled【C1】_____than5,000peopleontheroadsforthefirsttimeindecades.Creditgoeslargely【C2】___
LastyearFrenchdriverskilled【C1】_____than5,000peopleontheroadsforthefirsttimeindecades.Creditgoeslargely【C2】___
LastyearFrenchdriverskilled【C1】_____than5,000peopleontheroadsforthefirsttimeindecades.Creditgoeslargely【C2】___
LastyearFrenchdriverskilled【C1】_____than5,000peopleontheroadsforthefirsttimeindecades.Creditgoeslargely【C2】___
A、controlledB、overseenC、supervisedD、administratedC本题考核的知识点是:动词。A选项controlled控制。B选项overseen偷窥。C选项supervised监督。D选项administrate
In1984,PresidentRonaldReaganproposedthattheUnitedStatesconstructalaunchlaboratoryforaneweraofspaceexploratio
TheUniversityintransformation,editedbyAustralianfuturistsSohailInayatullahandJenniferGidley,presentssome20highly
Customerexperienceistheinternalandsubjectiveresponsecustomershavetoanydirectorindirectcontactwithacompany.71
随机试题
合伙企业登记事项发生变更的,执行合伙事务的合伙人应当自作出变更决定或者发生变更事由之日起__________内,向企业登记机关申请办理变更登记。
妊娠早期心脏病患者,决定是否继续妊娠,主要根据:
疾病流行出现周期性的主要原因是人群免疫水平的变化其条件中不包括
于中性乙醇中用氢氧化钠滴定液(0.1mo1/L)滴定法检查氯贝厂酯的酸度对乙酰氨基酚中对氨基酚的检查
正态方差σ2的无偏估计是()。
圆桌会议是指一种平等、对话的协商会议形式,是在举行国际或国内政治谈判时,为避免席次争执,表示参加各方地位平等起见而采取的一种围圆桌而坐的会议形式。根据上述定义,下列说法不正确的是()。
网络主权概念的提出,意味着国家行使主权去维护网络安全,但网络空问的特殊性决定了政府作用有限。政府决策者应关注如何在维护网络主权的同时__________互联网行业的健康发展,并且在维护网络主权与行业发展之间寻求恰当的__________。依次填入画横线部分
Afterclashesbetweenriotpoliceandprotesters,workersattheKeihinHotelinTokyowereforciblyejectedonJanuary25th.Th
编制一个好的程序首先要确保它的正确性和可靠性,除此以外,通常更注重源程序的(1)。此外,还应强调良好的编程风格,例如,选择标识符的名字时应考虑(2);在书写语句时应考虑(3);在书写功能性注解时应考虑(4)。源程序中应包含一些内部文档,以帮助阅读和
TheFamilyThenandNow Thingswerenevereasywithinthefamily.Butatatimewhenthefamilywasorientedtowardtheproduc
最新回复
(
0
)