网址：http://m.1010jiajiao.com/timu_id_3624211[举报]
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: The sun's summertime rays are more dangerous than once thought.
A team of scientists from 80 nations recently reported to the United Nations that a layer of ozone（臭氧层）in the atmosphere, which protects humans from harmful levels of ultraviolet（紫外线）radiation, will be thinner over the United States this summer．The thinner layer allows more ultraviolet rays from the sun to reach Earth．The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer.
Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter．The hole was caused in chemicals used in refrigerators and air conditioners．When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.
Concern about the protective ozone layer rose more recently when data from satellites and ground stations showed that ozone levels were dropping over areas other than Antarctica．Low ozone levels were recorded in the spring and summer over the United States and over other populated areas in the world.
Although many countries have already begun stopping the use of ozone-destroying chemicals, the new findings are expected to advance the timetable for a total ban of the chemicals.
1.The scientists have observed the ozone layer ______．
A．since 1980 B．since last winter
C．for more than 20 years D．for about one year
2.The ozone layer in the atmosphere can ______.
A．do a lot of good to human beings in many ways
B．protect humans from diseases caused by bad weather
C．do a lot of harm to human beings in the summer-time
D．protect humans from harmful levels of ultraviolet radiation
3.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．over the USA in the summertime in the mid-1980s
4.The damage to the ozone layer was caused by ______.
A．the changeable weather B．ozone-destroying chemicals
C．chemicals from refrigerators D．chemicals from air conditioners
查看习题详情和答案>>
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: The sun's summertime rays are more dangerous than once thought.
A team of scientists from 80 nations recently reported to the United Nations that a layer of ozone（臭氧层）in the atmosphere, which protects humans from harmful levels of ultraviolet（紫外线）radiation, will be thinner over the United States this summer．The thinner layer allows more ultraviolet rays from the sun to reach Earth．The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer.
Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter．The hole was caused in chemicals used in refrigerators and air conditioners．When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.
Concern about the protective ozone layer rose more recently when data from satellites and ground stations showed that ozone levels were dropping over areas other than Antarctica．Low ozone levels were recorded in the spring and summer over the United States and over other populated areas in the world.
Although many countries have already begun stopping the use of ozone-destroying chemicals, the new findings are expected to advance the timetable for a total ban of the chemicals.
The scientists have observed the ozone layer ______．
A．since 1980 B．since last winter
C．for more than 20 years D．for about one year
The ozone layer in the atmosphere can ______.
A．do a lot of good to human beings in many ways
B．protect humans from diseases caused by bad weather
C．do a lot of harm to human beings in the summer-time
D．protect humans from harmful levels of ultraviolet radiation
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．over the USA in the summertime in the mid-1980s
The damage to the ozone layer was caused by ______.
A．the changeable weather B．ozone-destroying chemicals
C．chemicals from refrigerators D．chemicals from air conditioners
查看习题详情和答案>>
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
A person, like a commodity (商品), needs packaging．But going too far is absolutely undesirable．A little exaggeration, however, does no harm when it shows the person's unique qualities to their advantages．To show personal attractiveness in a casual and natural way, it is important for one to have a clear knowledge of oneself．A skilled packager knows how to add art to nature without any signs of embellishment (装饰), so that the person so packaged is not a commodity but a human being, lively and lovely．
For a young person, especially a female, shining with beauty and full of life, any attempt to make up would be self-defeating．Youth, however, comes and goes in a flash．Packaging for the middle-aged is primarily to hide the marks made by years．If you still enjoy life enough to keep self-confidence and work at pioneering work you are unique in through plains, mountains and jungles, running its course as it should．You have really lived your life, which now arrives at a self-satisfied stage of quietness and calmness with no interest in fame or wealth．There is no need to make use of hair dyeing．The snowcapped mountain is itself a beautiful scene of fairyland．Let your looks change from young to old in step with the natural ageing process so as to keep in harmony (和谐) with nature, for harmony itself is beauty, while the other way round will only end in unpleasantness．To be in the elder's company is like reading a thick book of deluxe edition (豪华版) that attracts one so much as to be unwilling to part with．
As long as one finds where one stands, one knows how to package oneself, just as a commodity sets up its brand by the right packaging．
1．It can be concluded from the text that ________．
[ ]
A．people should be packaged at all ages
B．people should be packaged in a special way
C．elderly people also care about packaging
D．proper packaging shows a person's unique qualities to their advantages
2．Which of the following is NOT the author's advice?
[ ]
A．Hair-dyeing is not desirable．
B．Young women should not attempt to make up．
C．To show attractiveness, exaggeration in packaging is essential．
D．Packaging should be done without any signs of embellishment．
3．The underlined sentence means that elderly people ________．
[ ]
A．are usually packaged like a fine book
B．have rich experience and profound knowledge of life
C．do a lot of traveling and are well-informed
D．enjoy reading thick books about nature and fairylands
查看习题详情和答案>>