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
2024-01-15
33
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/3365927.html
相关试题推荐
It(was)inthisschool(where)he(hadstudied)(for)fouryears.A、wasB、where
Thenewpowerplantisreported________withinthreeyears.A、havingbeencomplete
Fewpeoplenowadaysareableto______friendshipintotheirsenioryears.A、postpo
Thecompanyhas______heavyfinanciallossesoverthelasttwoyears.A、enduredB、
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
Halfoftheworld’scoralreefs(珊瑚礁)havediedinthelast30years.Nowsci
我学习英语大概有十年了。IhavebeenlearningEnglishforabout10years.
随机试题
OurculturehascausedmostAmericanstoassumenotonlythatourlanguagei
ReportonaTask
MarriageMarriageistraditiona
Thesecretaryresignedfromherjobasshefeltsickofdealingwith______matt
Ascientistoncesaidthatstudyingthestarsfromtheearthis【C1】______lo
暑湿感冒,暑热偏盛,热盛烦渴者,治疗方剂宜首选A.新加香薷饮 B.黄连香薷饮
根据下列材料设计教学片段。 (1)《普通高中历史课程标准(实验)》:知道古代中
价值研究与事实研究的差异是什么?
下列各组密码子中属于终止密码子的是A.UGA、AUG、GAU B.UAA、GA
下列各项中,属于编制审计工作底稿的其他目的的有()。A.有助于项目组计划和
最新回复
(
0
)