If glohal warming goes on like this, Maldives in the Indian Oceanin the century to come.A．disappearsB．disappearedC．has disappearedD．is going to disappear
If glohal warming goes on like this, Maldives in the Indian Oceanin the century to come.
A．disappears
B．disappeared
C．has disappeared
D．is going to disappear
B．disappeared
C．has disappeared
D．is going to disappear
参考解析
解析：考查动词时态。be going to“将要”，表将来。句意为“如果全球变暖像现在这样持续下去的话。那么在印度洋的马尔代夫将会在下一个世纪消失”。故选D。
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共用题干New research from NASA scientists suggests emissions of black soot after the way sunlight re- flects off snow.According to a computer simulation,black soot may be responsible for 25 percent of observed global warming over the past century. Soot in the higher latitudes（维度）of the Earth,where ice is more common , absorbs more of the sun's energy and warmth than an icy,white background. Dark-colored black carbon,or soot, absorbs sunlight,while lighter colored ice reflects sunlight.Soot in areas with snow and ice may play an important role in climate change.Also,if snow and ice covered areas begin melting,the warming effect increase,as the soot becomes more con-centrated on the snow surface.“This provides a positive feedback,as glaciers and ice sheets melt, they tend to get even dirtier.”said Dr. James Hansen,a researcher at NASA's Goddard Institute for Space Studies,New York.Hansen found soot's effect on snow albedo（反照率）,which may be contributing to trends to-ward early springs in the Northern Hemisphere,such as thinning Arctic sea ice and melting glac-iers permafrost. Soot also is believed to play a role in changes in the atmosphere above the oceans and land.“Black carbon reduces the amount of energy reflected by snow back into space,thus heating the snow surface more than if there were no black carbon,”Hansen said. Soot's increased absorp-tion of solar energy is especially effective in warming the world's climate.“ This forcing is unusual-ly effective,causing twice as much global warming as a carbon-dioxide forcing of the same magni-tude.”Hansen noted.Hansen cautioned,although the role of soot in altering global climate is substantial,it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past century .Such gases are expected to be the largest climate forcing for the rest of the century.The researchers found that observed warming in the Northern Hemisphere was large in the winter and spring at middle and high latitudes. These observations were coherent with the researchers' climate model situations,which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight. What is the main cause of climate warming during the past century?A: Soot.B: Snow.C: Greenhouse gases.D:.Wind.
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If global warming goes on like this, Maldives in the Indian Ocean __________ in the century.to come.A.disappearsB.disappearedC.has disappeared D.is going to disappear
共用题干Global Warming1 Smoke is clouding our view of global warming,protecting the planet from perhaps three-quarters of the greenhouse（温室）effect.That might sound like good news, butexperts say that as the cover diminishes in coming decades,we are facing a dramatic increase of warming that could be two or even three times as great as official best guesses.2 This was the dramatic conclusion reached last week at a workshop in Dahlem,Berlin, where top atmospheric scientists got together,including Nobel prize winner Paul Crutzen and Swedish scientist Bert Bolin,former chairman of the UN's Intergovernmental Panel on Climate Change(IPCC).3 IPCC scientists have suspected for a decade that aerosols（浮质）of smoke and other particles from burning rainforest,crop waste and fossil fuels are blocking sunlight andcounteracting the warming effect of carbon dioxide（二氧化物）emissions.Until now,they reckoned that aerosols reduced greenhouse warming by perhaps a quarter,cutting increases by 0.2℃．So the 0.6℃of warming over the past century would have been 0.8℃ without aerosols.4 But the Berlin workshop concluded that the real figure is even higher一aerosols may have reduced global warming by as much as three-quarters,cutting increases by 1.8℃.If so, the good news is that aerosols have prevented the world getting almost two degrees warmer than it is now.But the bad news is that the climate system is much more sensitive togreenhouse gases than previously guessed.5 As those gases are expected to continue accumulating in the atmosphere while aerosols stabilize or fall,that means"dramatic consequences for estimates of future climate change",the scientists agreed in a draft report from the workshop.Paragraph 5________A:Atmospheric ScientistsB:The Calculations Made at the Berlin WorkshopC:The Previous Calculations of the Effect of AerosolsD:The Scientists' AgreementE:The Authoritative ConclusionF:Greenhouse Gases
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