When does dew form? Where do continental polar air masses form? When did the ozone layer form? When did the Ouachita orogeny occur? How does Arctic Sea ice form? When was the Gulf Stream discovered? When does evapotranspiration occur?
根据第三段中的Scientists firstbecame concerned about the ozone layer in the mid-1980swhen a hole was discovered in the layer above Antarcticaduring the winter.可知,科学家们在20世纪80年代就发现了南极洲上空的臭氧层空洞,因而可知观察臭氧层的历史已经超过20年了,故选C。]9.D[提示:细节理解题。根据...
【题目】Damage to Ozone layer Gets Worse In the middle of winter, when snow is fal ling in many parts of the United States, scien tists have sounded a warning to people who pl an to spend many hours in the sun this sum mer. T he warning is: T he sun's summertime rays are more...
When did the oceans form? Who coined the term ocean acidification? When is the Great Barrier Reef expected to die? When was the Great Barrier Reef declared a national park? When did the Great Barrier Reef form? When was the first ice age?
【题目】Damage to Ozone Layer Gets WorseIn the middle of winter, when snow is fallingin many parts of the United States, scientistshave sounded a warning to people who plan tospend many hours in the sun this summer.T he warning: T he sun's summertime rays are more dangerous than once ...
.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
Scientists first became concerned about the ozone layer in the mid1980s when a hole was discovered in the layer above Antarctic 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...
43. Scientists first found that there was a hole in the ozone layer___. A. above Arctic during the winter in the mid-1980s B. above Antarctica during the winter in the mid-1980s C. over somewhere in the north of the equator in 1980 D....
Semi-empirical models to relate the conversion of total Antarctic stratospheric chlorine (Cly) to activated Antarctic stratospheric chlorine (defined by daytime chlorine monoxide (ClO)), and the quantity of activated chlorine to the rate of ozone destruction were developed. These two models provide a...
Scientists first became concerned 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 ...