首页
登录
职称英语
[originaltext] An environment that is biologically diverse has lots of diffe
[originaltext] An environment that is biologically diverse has lots of diffe
游客
2025-03-26
14
管理
问题
An environment that is biologically diverse has lots of different plants and animals. This is needed for people to have enough high-quality food to lead active and healthy lives.
The idea of biodiversity recognizes that natural systems are complex and depend on one another.
In agriculture, depending on only a few crops can be dangerous. One example is the Great Potato Famine in the eighteen forties. Ireland depended on potatoes as a food resource. But a disease ruined the crop for several years. More than one million people died from hunger.
Yet experts say the world depends on only four crops to provide half its food energy from plants. These are wheat, maize, rice and potato. The experts say it is important to support a large number of different food crops and farm animals that can survive different conditions. Such diversity helps to reduce the risk from losing one main crop.
Farmers also have a responsibility to protect wild species. The Food and Agriculture Organization says more than forty percent of all land is used for agriculture. Farm fields are an important place for wild animals to live and reproduce. Also, farmers must consider the effects that agriculture has on the environment. Farm pollution or poor agricultural methods can harm wetlands, rivers and other environments needed to support life.
Invasive species are a severe threat to biodiversity. Plants and animals often spread without natural controls when they enter areas they are not native to. They can destroy crops, native species and property. Invasive species cost the world economy thousands of millions of dollars each year.
Q13: What does this report mainly talk about?
Ql4: According to experts, what are the four crops the world chiefly depends on?
Q15: Why are invasive species a severe threat to biodiversity?
选项
A、Importance of biodiversity.
B、Protection of wild species.
C、Farm pollution.
D、Agricultural methods.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4013898.html
相关试题推荐
[originaltext]Physicalactivitymayhelpstudentsdobetterintheirclasse
[originaltext]M:Whattimedoesthelibraryclose?W:OnTuesdayandFridayit
[originaltext]M:Whattimedoesthelibraryclose?W:OnTuesdayandFridayit
[originaltext]W:Larry,areyoufeelingOK?You’resoquietatthepartytonigh
[originaltext]W:Larry,areyoufeelingOK?You’resoquietatthepartytonigh
[originaltext]W:Larry,areyoufeelingOK?You’resoquietatthepartytonigh
[originaltext]W:Larry,areyoufeelingOK?You’resoquietatthepartytonigh
[originaltext]W:Larry,areyoufeelingOK?You’resoquietatthepartytonigh
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[br][originaltext]
DynaTAC8000Xwasa______(2words)oftencalled"thebrick."[br][originaltext]
随机试题
Whatisthepurposeofthisletter?ToaskABCCo.,Ltd.whethertheywouldlike
Booksaresteadilyincreasinginsize:theaveragenumberofpageshasgrownby
以下关于假设检验的命题,哪一个是正确的?A.如果Ho在α=0.05的单侧检验中被
设0
A.3次 B.4次 C.5次 D.6次
处罚公开、公正、过罚相当原则中的“过罚相当”是指()。A.行政处罚法要求对违法行
(2015年)下列因素中,用于确定动态变形测量精度指标的有()。A.变
女性,13岁。左上前牙突然出现明显的咬合痛、自发痛3天。口腔检查:恒牙列,牙周检
投资估算编制说明包括的内容有()。A.价格和取费参考的有关资料信息 B.说明项
对维持血管内外水平衡有重要作用的是 A.血浆晶体渗透压 B.血浆 C.血浆
最新回复
(
0
)