Quel âge a-t-il ?
第1题
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.
(21)
第2题
A.constant change
B.bad weather
C.utter confusion
D.fuel shortages
第3题
A.constant change
B.bad weather
C.utter confusion
D.fuel shortages
第4题
第5题
A.A rider jumping on a horse's back.
B.A ball being hit by a bat.
C.A boat powered by a motor.
D.A door closed by a gust of wind.
第6题
A.It is the first of its kind in Camden.
B.It has sold the majority of its condos.
C.Its construction has been completed.
D.It is accessible by public transport.
第7题
A、La grippe aviaire.
B、La grippe espagnole.
C、La pneumonie atypique
D、Le coronavirus.
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!