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
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
2022-10-01
109
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 warming 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.
Coral 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.
According to the passage,________is the biggest threat to coral reefs.
选项
A、pollution
B、overfishing
C、industrial activity
D、climate change
答案
D
解析
第五段第一句话“Although reefs face other threats from pollution, industrial activities, and overfishing, it is global climate change that most concerns scientists.”。细节题。题干问的是“根据全文,珊瑚礁的最大威胁是什么?”根据定位句“尽管珊瑚礁面临着环境污染(A项),工业生产(C项)以及过度捕捞(B项)等其他威胁,但是全球气候变化(D项)依然是科学家们最为担忧的。”可知,尽管珊瑚礁面临的威胁有很多,但是科学家认为最大的威胁来自气候变化。故选D。
转载请注明原文地址:https://kaotiyun.com/show/7bcD777K
0
成人本科学位英语
相关试题推荐
Scientistssentpatternsofelectricitycoursingacrosspeople’sbrains,coaxingtheirbrainstoseelettersthatweren’tthere.
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
Scientistshavediscoveredapowerfulantibioticinthebloodstreamofgiantpandasthatcandestroybacteria.TheChineserese
随机试题
对一表现为急性起病,肢体对称性、进行性、弛缓性瘫痪的患儿,最合适的辅助检查是
社会服务策划方案的评估()。
计算机的内存可采用()
A.补肾壮阳,润肠通便B.补肾壮阳,养肝明目C.补肾壮阳,固精缩尿D.温肾壮阳,强筋骨,祛风湿补骨脂具有的功效是
未经批准擅自开办医疗机构行医的,承担以下法律责任,除了
某区人大代表换届选举时,居住在某社区的陈某发现选举委员会公布的选民名单中遗漏同社区刘某的名字。陈某向选举委员会申诉被驳回,陈某向人民法院起诉。关于本案的下列哪些表述是正确的?()
关于财产租赁的转租问题,下列说法中,正确的是()。
与高级时装等非生活必需品相比,粮食等生活需求品的需求价格弹性是()。
研究发现,长江干流江苏段河床在1985年前后平均冲淤状态发生了明显的转变,由淤积转变为冲刷。其主要原因是()。
WhathaveEuropeanfoodmanufacturersbeengivenoneyeartodo?
最新回复
(
0
)