Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
The science of meteorology is concerned with the study of the structure, state, and behavior. of the atmosphere. The subject may be approached from several directions, hut the scene cannot be fully appreciated from any vantage point. Different views must be integrated to give perspective to the whole picture.
One may consider the condition of the atmosphere at a given moment and attempt to predict changes from that condition over a period of a few hours to a few days ahead. This approach is covered by the branch of the science called synoptic(天气的) meteorology.
Synoptic meteorology is the scientific basis of the technique of weather forecasting by means of the preparation and analysis of weather maps and aerological diagram. The practical importance of the numerous applications of weather forecasting cannot be overestimated. In serving the needs of shipping, aviation, agriculture; industry, and many other fields of human activities with accurate weather warnings and professional forecast advice, great benefits are reaped in the form. of the saving of human life and property and in economic advantages of various kinds. One important purpose of the science of meteorology is constantly to strive, through advanced study and research, to increase our knowledge of the atmosphere with the aim of improving the accuracy of weather forecasts.
The tools needed to advance our knowledge in this way are the disciplines of mathematics and physics applied to solve meteorological problems. The use of these tools forms that branch of the science called dynamic meteorology.
The best title for the passage is ______.
A. The Basics of Dynamic Meteorology
B. The Limitations of Meteorological Forecasting
C. Approaches to the Science of Meteorology
D. New Advances in Synoptic Meteorology
A.He was attracted by Mrs Jones.B.He had heard a noise.C.He had run out of gas.D.His t
A. He was attracted by Mrs Jones.
B. He had heard a noise.
C. He had run out of gas.
D. His tyros were punctured.
In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities.
Skyscrapers are also lavish consumers and wasters of electric power. In one recent year, the addition of 17 million square feet of skyscraper office space in New York City raised the peak daily demand for electricity by 120,000 kilowatts—enough to supply the entire city of Albany, New York, for a day.
Glass-walled skyscrapers can be especially wasteful. The heat loss(or gain) through a wall of half-inch plate glass is more than ten times that through a typical masonry wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass I and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings.
Skyscrapers put a severe strain on a city's sanitation(卫生) facilities, too. If fully occupied, the two(former) World Trade Center towers in New York City would alone generate 2.25 million gallons of raw sewage(污物) each year—as much as a city the size of Stamford, Connecticut, which has a population of more than 109,000. Skyscrapers also interfere with television reception, block bird flyways, and obstruct air traffic. In Boston in the late 1960's some people even feared that shadows from skyscrapers would kill the grass.
Still, people continue to build skyscrapers for all the reasons that they always have to build them—personal ambition, civic pride, and the desire of owners to have the largest possible amount of rentable space.
The main purpose of the passage is to ______.
A. discuss the advantages and disadvantages of skyscrapers
B. compare skyscrapers with other modern structures
C. describe skyscrapers and their effect on the environment
D. illustrate various architectural designs of skyscrapers
A.To tell children how to learn to read.B.To love animals.C.To love life.D.To develop
A. To tell children how to learn to read.
B. To love animals.
C. To love life.
D. To develop enthusiasm for reading and help a child to learn how to read.