Question

8．Scientists have long understood the key role that oceans play in regulating the Earth's climate．Oceans cover 70 percent of the globe and store a thousand times more heat than the atmosphere does．What's newer is the understanding of how this key component （成分） of our climate system responds to global warming．
         A brake （刹车） on global warming-for now
One of the ocean's most important climate functions is absorbing heat and carbon dioxide （CO₂），one of the gases that cause global warming．Acting as a heat sponge （海绵），the oceans have absorbed huge amounts of heat and CO₂ in the last forty years．
Fujita explains that"the oceans are saving us from faster climate change-they are a big flywheel that delays rapid overheating of the earth，putting a brake on the climate system．"
"That's the good news，"he adds．"The bad news is that the oceans only slow the atmospheric warming．Once the oceans come to balance with a greenhouse-gas warmed earth，the extreme heat will remain in the atmosphere and things will get much hotter．"But where and how the oceans release this accumulated （积累） heat is uncertain．And as the ocean stores heat，fragile underwater ecosystems are struggling．
The most recent scientific report from the Intergovernmental Panel on Climate Change （IPCC）also notes with concern that the ocean is acidifying （酸化） because of increased absorption of atmospheric CO₂，and thus causing a threat for shell-forming species．Sharp increases in carbon dioxide levels will cause further acidification of the ocean．
         Currents distributing heat
Another important role the oceans play is that of distributor．Oceans deliver heat and life-sustaining nutrients around the globe．Just as blood vessels bring oxygen and nutrients to cells in the human body，the ocean's currents carry oxygen，nutrients and heat throughout the Earth．The ocean distributes 25 to 50 percent of the energy the planet receives from the sun．For example，the Gulf Stream carries heat across the Atlantic．This warm current gives northwestern Europe a milder climate than it would normally have so far north．A change to the ocean's circulation （循环） patterns could throw Europe into a colder period，even as the rest of world experiences warmer temperatures．
53．We can infer from the passage thatD．
A．the oceans cause global warming            
B．the oceans stop global warming
C．the oceans release nutrients and heat        
D．the ocean ecosystems face more dangers
54．From the passage we can learn that the ocean's currentsC．
A．produce oxygen and nutrients everywhere    
B．absorb 25-50% of the energy from the sun
C．distribute heat and nutrients around        
D．change the ocean's circulation patterns
55．Which of the following is NOT the result of the ocean absorbing heat and carbon dioxide？A
A．It makes the atmosphere hotter．          
B．It affects shell-forming species．
C．It causes further acidification．             
D．It regulates the Earth's climate．
56．This passage mainly talks aboutA．
A．the roles of oceans
B．global warming   
C．ocean currents                   
D．carbon dioxide．

Answer 1

分析 文章讲述了海洋中调节地球气候方面所起的作用．海洋可以吸收热量和二氧化碳，可有效调节地球气候，延缓全球变暖．水流还可以充当地球散热器的功能，还可向全球的事物输送营养物质．因此，保护海洋刻不容缓．

解答 答案：53．D 推理判断题．文章第四段说The most recent scientific report from the Intergovernmental Panel on Climate Change （IPCC）also notes with concern that the ocean is acidifying （酸化） because of increased absorption of atmospheric CO₂，and thus causing a threat for shell-forming species．Sharp increases in carbon dioxide levels will cause further acidification of the ocean因为吸收了空气中太多的二氧化碳，海洋正在酸化，造成了对地球保护壳的威胁．故选D．
54．C 推理判断题．文章最后一段说Another important role the oceans play is that of distributor．Oceans deliver heat and life-sustaining nutrients around the globe．Just as blood vessels bring oxygen and nutrients to cells in the human body海洋就像人体的血管一样，给全球输送热量和维持生命的营养物质．故选C．
55．A 细节判断题．选项中BCD是文章讲述的内容，只有A项让大气层变热，与文章讲述的内容相反，是错误的．故选A．
56．A 主旨大意题．文章一开始就说Scientists have long understood the key role that oceans play in regulating the Earth's climate长久以来科学家们都知道海洋在调节地球气候中发挥关键作用．故选A．

点评 阅读理解是考查语篇理解能力．常考的题型有：推理判断题；主旨大意题；细节理解题；猜测词意题．近几年又出现了两种新的考查方式：写作态度判断题和文章结构题．解题时，在读懂文章的基础上，还有特别注意掌握题型的特征，尤其是细节题和推断题不可混淆：细节题是文章信息的再现；推断题是文章信息的提取．本题是广告类文章，考查主要是以细节题为主，细节题要注意常用的出题陷阱有：夸大，缩小，张冠李戴，偷梁换柱，无中生有等，做题时要看清看准．