浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(11)含答案
阅读理解(第一节20小题。第二节5小题;每小题2分,满分50分)
第一节:阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题纸上将该选项标号涂黑。
A
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 of our climate system responds to global warming.
A brake 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.
The most recent scientific report from the Intergovernmental Panel on Climate Change (IPCC) also notes with concern that the ocean is acidifying 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.
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