首页
登录
职称英语
Half of the world’s coral reefs(珊瑚礁) have died in the last 30 years. Now sci
Half of the world’s coral reefs(珊瑚礁) have died in the last 30 years. Now sci
游客
2025-03-03
6
管理
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).
(78)
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.
(79)
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. [br] 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
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于气候变化。故选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3980489.html
相关试题推荐
Halfoftheworld’scoralreefs(珊瑚礁)havediedinthelast30years.Nows
Halfoftheworld’scoralreefs(珊瑚礁)havediedinthelast30years.Nows
Theplanet’shealthdependsonthesurvivalofcoralreefs.珊瑚礁的生存关乎地球是否处于健康状态。
Halfoftheworld’scoralreefs(珊瑚礁)havediedinthelast30years.Nowsci
我学习英语大概有十年了。IhavebeenlearningEnglishforabout10years.
Coralsareparticularlysensitivetochangesintemperature.珊瑚礁对温度的变化特别敏感。
我们认识有十年了。Wehaveknowneachotherfortenyears.
Bytheendofnextmonth,you______hereforthreeyears.A、willhavestudiedB、st
Heisworkingveryhardto______thelosttimeinthepast10years.A、makeforB、
Halfoftheworld’scoralreefs(珊瑚礁)havediedinthelast30years.Nowsc
随机试题
EffectiveNote-takingThedifficultyoftakingnotes:No
Whatseemstosurprisethemanaboutthenewproduct?[br][originaltext]W:I’v
Petbirdscannotonlyimitatesounds,theycandistinguishbetweenlanguage
Halliday’swritingleanedverymuchbacktotheleft.Hewastheonlypupil
哪一部位的骨折宜采用大悬臂带固定?( )A.锁骨骨折 B.肱骨骨折 C.尺
保险公司计人附属资本的次级债金额不得超过净资产的( )A.30% B.40%
下列止血药中,可用于须发早白的是A.白茅根 B.苎麻根 C.侧柏叶
火灾自动报警系统形式与选择、火灾探测器选择 某科研楼为一类高层建筑,需在计算机
《电信服务规范》的内容包括( )。 A.服务时间标准 B.服务价格标
资本金现金流量表是以技术方案资本金作为计算基础,站在( )的角度编制的。A.项目
最新回复
(
0
)