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
专升本
Half of the world’ s coral reefs(珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive.
Half of the world’ s coral reefs(珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive.
admin
2019-03-28
50
问题
Half of the world’ s coral reefs(珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive. Even if global warning were to stop right now, scientists predict that more than 90% of corals will die by 2050. If no major steps are taken to
address
the problem, the reefs may be headed for total extinction(灭绝).
The planet’ s health depends on the survival of coral reefs. They are often described as " the rainforests of the sea" , because they provide shelter for a wide variety of sea life. In addition, the reefs serve as barriers that protect coastlines from the full force of powerful storms.
Corals are used in medical research for cures to diseases. They are key to local economies as well, since the reefs attract tourists, the fishing industry, and other businesses, bringing in billions of dollars.
Corals are particularly sensitive to changes in temperature. A rise of just 1 to 2 degrees can force the corals to drive out the algae (水藻). Then the corals turn white in a process called "bleaching". Corals can recover from short-term bleaching, but long-term bleaching can cause permanent damage. In 1998, when sea surface temperatures were the highest in recorded history, coral reefs around the world suffered the most severe bleaching. It is estimated that even under the best of conditions, many of these coral reefs will need decades to recover.
Although reefs face other threats from pollution, industrial activities, and overfishing, it is global climate change that most concerns scientists. Scientists remain hopeful that it’ s not too late to save the reefs, and some are moving ahead on experiments to accomplish that goal.
Why are coral reefs called "the rainforests of the sea"?
选项
A、Because they are home to a wide variety of sea life.
B、Because they can protect our coasts from storms.
C、Because they might supply natural medicines.
D、Because they look like rainforests.
答案
A
解析
根据第二段第二句“They are often described as‘the rainforests of the sea’,because they provide shelter for a wide variety of sea life.”可知,珊瑚礁被称为“海洋的热带雨林”,是因为它们为大量的海洋生物提供了天然的庇护所。故选A。
转载请注明原文地址:https://www.kaotiyun.com/show/IIJC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Wegotupearlythismorningand【C1】______alongwalkafterbreakfast.Wewalked【C2】______thebusinesssectionofthecity.I
Henever()tohiscustomersinhisbusinessexceptoccasionallyforsomespecialreasons.Thistimehecutthepricebyhalf,
A、Thebackpocketofhistighttrousers.B、Thetoppocketofhisjacket.C、Asidepocketofhisjacket.D、Asidepocketofhist
Duringherchildhood,Rachelshowedaninterestinnatureandinwriting.Afterhighschool,sheenteredPennsylvaniaStateColl
______breaksthelawwillbepunishedsoonerorlater.
A、Atatheatre.B、Atabookingoffice.C、Atarailwaystation.D、Atarestaurant.D
SomenewarrivalstoAmericacomefromothercultureswhereitisconsideredimpolitetoworktooquickly.
A、Nearthetrainstation.B、Inthecountryside.C、Inthecity.D、Neartheworkplace.B本题是对细节进行提问。根据女士的回答“Butthecountryissob
ItwasMike______openedthedoorforme.
The______majoritywereinsupportofthisbillsoitwaspassedwithoutmuchdifficulty.
随机试题
简述报社多种经营立项论证的注意事项。
肺癌治疗后预后最好的是()
临床见恶心、呕吐呃逆、暖气等症频作,其病机是
某企业承揽了某建设单位的大型工程项目,该企业根据项目管理规划大纲确定的组织形式设立了项目经理部,并签订了项目管理目标责任书。在施工过程中,该项目经理部的运行情况良好。问题项目经理部组织形式的选择应根据什么来确定?
段先生为某国有大型企业员工,去年9月份,段先生在某小区买了一处住宅,房屋总价70万元,贷款40万元。段先生听说等额本金法下还款利息较少,遂按照等额本金的方法贷款20年,按月还款,假设贷款利率为7%。段先生如果按照这种方法将所有款项还清,不考虑货币时间价
长江公司拟加盟某快餐集团,加盟经营协议期限15年,加盟时一次性支付450万元加盟费,加盟期内,每年按年营业额的10%向乙集团支付特许经营权使用费和广告费,长江公司预计将于2017年12月31日正式加盟,目前正进行加盟店2018年度的盈亏平衡分析。其他相关
2004年干细胞研究取得的突破性进展,下列表述错误的一项是()。对“生物医学与其他学科交叉的现象激增”这句话理解正确的一项是()。
根据2004年通过的《中华人民共和国宪法修正案》,下列有关国家对个体经济等非公有制经济实行的政策的方案表述,正确的是()。
资本主义经济管理和社会主义经济管理都具有二重性。()
WhatwillthewomandoonFriday?
最新回复
(
0
)