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
There are at least three ways to promote more effective use of the earth’s resources for food: cultivate the oceans, develop hig
There are at least three ways to promote more effective use of the earth’s resources for food: cultivate the oceans, develop hig
admin
2010-06-18
35
问题
There are at least three ways to promote more effective use of the earth’s resources for food: cultivate the oceans, develop higher-protein cereals, and increase the palatability of rarely consumed foods.
At first glance, increased reliance on food from the oceans is an attractive alternative. Although they cover about three-fourths of the earth’s surface and lie near most population concentrations, oceans historically have provided a relatively small percentage of world food supply. Approximately two-thirds of the fish caught from the ocean is consumed directly, while the remainder is converted to fish meal and fed to poultry and hogs.
Hopes were raised during the 1950s and 1960s that increased fish consumption could meet the needs of a rapidly growing global population. Between approximately 1945:and 1970, fish consumption did increase faster than the rate of world population growth and exceeded beef as a source of animal protein. But since 1970 the world fish catch has increased more slowly and in some years has actually declined.
Over fishing has caused the lack of growth in the number of fish caught. The population of some fish species has declined because they have been caught at a more rapid rate than they can reproduce. Over fishing has been particularly acute in the North Atlantic and Pacific oceans.
To protect fishing areas, several countries have claimed control of the oceans beyond the long-accepted 3 nautical miles. Peru and Ecuador have declared a 200-mile off-shore limit in the Pacific, while Iceland has established a 50-mile jurisdiction in the North Atlantic. These countries seized foreign fishing boats that ignore the extended boundary claims.
Peru has been especially sensitive to the over fishing problem after the country’s catch of anchovies, its most important fish , declined by more than 75 percent between 1970 and 1973. To prevent further overfishing, the government nationalized its fish meal production industry, but the Peruvian experience demonstrates that the ocean is not limitless source of fish.
Increased use of fish for food may depend on the development of fish farming, rather than fishing in the ocean. Fish farming accounts for approximately 6 percent of the world’s total fish catch, but 40 percent of China’s fish is raised on farms. India and the Soviet Union rank behind China as the second and third leading countries for fish farming. In the United States, only catfish and trout are produced in any quantity on farms.
According to the passage, China set a good example in ______.
选项
A、increasing food supply by fish farming
B、regulating off-shore fishing
C、imposing quotas on the quantity of fish annually caught
D、decreasing fish consumption in order to protect ocean resources
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/xRlO777K
0
专业英语八级
相关试题推荐
MsBrendaStevenssuggeststhatbeforeapplyingjobapplicantsshouldIsitwisetoadmitsomeofyourweaknessesrelatingtow
OnecharacteristicoftherichclassesofadecliningsocietyistheirtendencytoEtiquetteasanartofgraciouslivingisqu
TravelmedicineinBritainisThemaininterestoftravelcompaniesdealingwithtravelmedicineisto
DemographicindicatorsshowthatAmericansinthepostwarperiodweremoreeagerthanevertoestablishfamilies.Theyquicklyb
AccordingtotheUNHumanDevelopmentReport,whichisthebestplaceforwomenintheworld?
Accordingtothedoctor,KapsakandEkaUdo’schildrenAllofthefollowingcanbeinferredfromthepassageEXCEPTthat
A、Angelsenjoyedwidesupportfromadultmoviegoersaswellasyoungsters.B、Theadvertisementplayedagreatrole.C、Theaudien
Toseehowbigcarrierscouldcontroltheonlineworld,youmustunderstanditsstructures.EarthlinkgivesJenniferaccesst
A、adonationceremony.B、anaidprogrammeeting.C、ananti-governmentprotest.D、anoppositionpartymeeting.B答题的关键在于理解原文中coin
A、Atleast8.B、Morethan30.C、Atleast120.D、Notmentioned.A
随机试题
科举制建立与全面推行的时代是_______。
细胞内液绝大部分存在于
地方性氟中毒病区居民主要摄氟途径是
宪法的规范作用不包括下列哪一项?()
()是建设项目参与各方实现基于角色(Role-Based)的界面设置。
质量m为10kg的木箱放在水平地面上,在水平拉力F的作用下由静止开始沿直线运动,其拉力随时间的变化关系如图7所示。若已知木箱与地面间的动摩擦因数μ为0.2,g取10m/s2,用积分法求:t=4s时,木箱的速度大小;
根据我国宪法和法律,下列选项哪一个是正确的?()
王某给有关部门写信,反映自己关于推进素质教育的意见。这是公民依法行使()。
A、 B、 C、 D、 D
Youshouldgetridofsomeofyour______fatbytakingmoreexercise.
最新回复
(
0
)