Laughing Gas: New Threat to the Ozone Layer Decades before, scientists discovered that CFCs were making a hole in the ozone laye over Antarctic a (南极洲). This put humankind in (A) ___. In 1989, over 190 nations signed the Montreal Protocol(《蒙特利尔议定书》) to phase out the use ...
III.阅读理解 阅读下面短文.从每题所给的A.B.C和D项中选出最佳选项.并在答题卡上将该项涂黑.AAgainst the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees
Recounts a news briefing at the National Aeronautics and Space Admininstration where two teams of researchers reported finding 'exceptionally high levels' of chlorine monoxide in mid-northern latitudes last month. The finding raised the possibility that the protective layer of ozone could diminish ...
阅读理解 Against the supposition that forest fires in Alaska Canada and Siberia warm the climate scientists have discovered that cooling may occur in areas where burnt trees allow more snow to
(8分)Scientists from the University of East Anglia have identified four new man-made gases that are contributing to the damage to the ozone(臭氧) layer. Two of the gases are accumulating at a rate that is causing concern among researchers. Worries over the growing ozone hole have seen the ...
about the ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter.The hole was caused by chemicals used in refrigerators and air conditioners.When these chemicals are sent out into the atmosphere,they produce gases that destroy the ozone.Concern...
根据Venus(金星),the planet closest to ours.可知,金星离地球最近。故选D。(2)B.细节理解题。根据British scientists have discovered phosphine( 磷化氢) in Venus' atmosphere(大气层).Phosphine is a hopeful sign of life.英国科学家在金星大气层中发现了磷化氢。磷化氢是有希望的生命迹象。可知,因为在金星的...
about the ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter.The hole was caused by chemicals used in refrigerators and air conditioners.When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone. ...
.Damage to Ozone layer Gets Worse In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun this summer. The warning is: The sun’s summ
The release follows an intense conservation effort in recent years that centered on improving longtime survival rates for the sea creatures. In 2018, scientists discovered that leatherback sea turtles had returned to lay eggs in southern Thailand. 此次释放是在近年来大力开展的保护工作之后进行的,重点...