题目内容
Washington — The largest ozone (臭氧)hole ever observed has opened up over Antarctica, according to the scientists of the US National Aeronautics and Space Administration (NASA). They believe it is a sign that ozone — destroying gases produced years ago are just now causing the largest quantities of ozone to disappear.
This year’s South Pole ozone hole spreads over about 28.5 million square kilometers, an area three times larger than the landmass of the United States.
Pictures of the hole have been offered by NASA. The hole appears as a giant blue mass, totally covering Antarctica and stretching to the southern tip of South America.
“The last time the ozone hole was close to this size was in 1998, when it spread over about 27.2 million square kilometers,” NASA said.
Paul Newman, who works with NASA’s Total Ozone Mapping Spectrometer (TOMS) instrument on a NASA satellite, said ozone watchers had expected a big hole this year, but not this big.
The Antarctica ozone hole, first observed in 1985, is caused by the depletion (损耗) of Earth protecting ozone by human-made chemicals such as chlorofluorocarbons, known as CFCs.
“Even though these chemicals were not allowed to use from the beginning of 1987, they remain in the atmosphere and will continue to do so for years,” Newman said.
“This year’s large hole may have been caused by a change in a swirling high-level air current over Antarctica, which circles the area and contains the zone hole,” Newman said.
56. The text is mainly about ____ .
A. the discovery of the largest ozone hole B. the discovery of the Antarctica ozone hole
C. the history of the Antarctica ozone hole D. the size of the largest ozone hole
57. The time 1985 was talked about in the text because it was when the Antarctica ozone hole ____ .
A. was watched by Newman B. was first closed C. disappeared D. was first watched
58. There is a giant ozone hole over Antarctica because ____ over there.
A. human-made chemicals have protected ozone B. ozone has protected the earth
C. human-made chemicals have destroyed ozone D. human-made chemicals have increased ozone
56.A。57.D。58.C。
解析:
Passage A 本文讲述了由于一些化学物质的使用,南极上空的臭氧层被破坏,希望引起人们的重视,
停止使用破坏臭氧层的化学物质,以保护我们赖以生存的地球。
56.A。主旨大意题。纵观全文,主要是围绕着最大的臭氧洞的发现论述的。
57.D。本题为细节考查题。由第六段中的“The Antarctica ozone hole, first observed in 1985...”可得出答案。
58.C。本题为细节考查题。可根据第六段中的“The Antarctica ozone hole, first observed in 1985, is caused by the depletion (损耗) of Earth-protecting ozone by human-made chemicals...”得出答案。
Shirley Allen loved to sing and play the piano. She studied music in college and her 36 was to become a concert pianist or blues singer.
Everything 37 when she was 20 years old. She became sick with what doctors 38 was typhoid fever(伤寒)and she almost died. Doctors gave her medicine to help her get well, but the medicine 39 her to become 40 deaf. She could no longer hear the music which she had always 41.
Shirley would never give up playing the piano, 42 she did decide to change 43 . She transferred to Gallaudet University and studied English. In 1964 Shirley graduated from Gallaudet and looked for 44 . She wanted to be 45 and work full-time.
For three years, Shirley worked as a clerk in Washington, D.C. 46 , in 1967 she was asked to work at Gallaudet University as a dorm supervisor (宿舍监管员). Shirley supervised young women who 47 in the university during the school year. She also taught English. Somehow she found time to 48 graduate school at Howard University in Washington, D.C. In 1972, Shirley received her M.A. degree.
Always 49 a new challenge, in 1973 Shirley became a professor at National Technical Institute for the Deaf (NTID),which 50 deaf and hard-of-hearing students technical and professional training.
This 51 woman became the first black deaf female in the world to receive her Ph.D. She made 52 in 1992, 53 she received the highest degree in education from the University of Rochester in New York.
Dr. Shirley Jeanne Allen has traveled many roads and 54 many rainbows searching for her dream. With courage and 55, she never gave up.
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Events Calendar
TUESDAY
Landscape Pests (害虫)
Learn to identify, control and prevent seasonal landscape-disease and landscape-pest problems at the workshop, 3:30 pm. – 5 pm. Tuesday at the US National Arboretum, 3501 New York Ave NE, Washington. $15; registration required.
202-245-4521 or www.usna.usda.gov.
THROUGH AUGUST 3
Horticultural(园艺的) Art
Watercolors, pen-and-ink drawings and colored-pencil pieces by the Brookside Gardens School of Botanical (植物学的) Art and Illustration will be on display at the exhibit Botanic 2007: The Art and Science of Plants at Brookside Gardens Visitors Center, 1800 Glenallan Ave, Wheaton, through Aug. 3. Free. 301-962-1400 or www.brooksidegardens.org.
THROUGH SEPTEMBER 9
Botanical Art
Visit Patterns in Nature, an exhibit by Amy Lamb featuring photographs of flowers, leaves and other botanical life, at the US Botanic Garden Conservatory (温室),West Orangerie, 100 Maryland Ave SW, Washington, through Sept. 9. The conservatory is open 10 am. – 5 pm. Daily. Free. 202-225-8333.
THROUGH OCTOBER 8
Botanic Garden Exhibit
Celebrating America’s Public Gardens is on view through Oct. 8 at the US Botanic Garden, 100 Maryland Ave SW, Washington. The exhibit, on the Conservatory Terrace and in the National Garden, features displays of 20 public botanic gardens across the country. Hours are 10 am. – 5 pm. Daily. Free. 202-200-8956.
1.If you want to record your name for an event in advance, you may call _____.
A.202-225-8333 |
B.202-245-4521 |
C.301-962-1400 |
D.202-200-8956 |
2. If you go to Botanic Garden Exhibit, you _____.
A.can enjoy drawings and coloured-pencil pieces |
B.can learn how to kill pests living on the plants |
C.can find displays of 20 botanic gardens across the country |
D.will enjoy the photographs of flowers and leaves |
3. From the advertisement, we learn _____.
A.the first event is about growing healthy plants |
B.all of the events are free of charge |
C.there is no time limit to all the events |
D.you can find the information of all the events either by phone or by e-mail |