Ⅲ.Reading Comprehension（30 points, 2 points for each）從下列每篇短文的問題
后所給的四個選擇項中選出一個答案，并在答題紙上將相應(yīng)的字母涂黑。
Passage One
Questions 21 to 25 are based on the following passage. The economic costs of
noise to society are several. Airports are currently operating at less than
capacity because of noise regulations which restrict their hours of operation.
For instance, at Washington’s National Airport no jet traffic is allowed from
11 pm to 7 am. Other airports restrict the use of certain runways. One estimate
is that noise restrictions reduce possible airport use by 20 percent. The
profitable cargo trade is especially affected by night restrictions. In the case
of airports, jet engines may be modified to reduce their noise level, or insulation
（隔音）from air traffic noise may be provided by the purchase of land around
airports or the insulation of buildings. One estimate is that $5.7 billion would
be required to equip all existing jet engines with noise control devices. However,
considering the current state of the art, even taking this step will not reduce
noise levels at all points to acceptable values. Some combination of methods is
probably necessary. If all aircraft were made quieter by existing methods, there
would be a number of economic benefits. An increase in airport capacity would
occur. Property values near airports might rise. Transportation costs to and from
airports could be reduced since the airports now could be located closer to
population centers. Much research still needs to be done on the economic aspects
of noise reduction and noise effects. Although some of the effects of noise
pollution are known, more must be discovered about its effects on health,
productivity, property values and the quality of life. Furthermore, the cost of
noise pollution control to the economy as a whole needs to be investigated. The
public must be alerted to the dangers and economic costs of noise pollution so
that people may make intelligent choices and exert appropriate pressures.
21.There is no jet traffic at Washington’s National Airport from 11 pm to 7 am
because ____________.
A、it is extremely dangerous to fly in the dark
B、noise regulations restrict the hours of airport operation
C、some of its runways are not in good condition
D、cargo planes produce disturbing noises
22."The current state of the art"（in Para.2）means ____________.
A、a developed sense of beauty
B、the volume of present-day traffic
C、the most recently developed technology
D、insulation of air traffic noise
23.Noise reduction could lead to ____________.
A、increased airport capacity
B、lower property values
C、effective modification of existing jet engines
D、more transportation costs to and from airports
24.What is NOT mentioned in the passage?
A、Psychological strain.
B、Handling capacity of cargo.
C、Measures for noise reduction.
D、Public pressures.
25.The author of the passage is concerned primarily with ____________.
A、the effects of noiseon the quality of life
B、the role of air traffic restrictions
C、the production of quieter engines
D、the economic aspects of noise reduction
后所給的四個選擇項中選出一個答案，并在答題紙上將相應(yīng)的字母涂黑。
Passage One
Questions 21 to 25 are based on the following passage. The economic costs of
noise to society are several. Airports are currently operating at less than
capacity because of noise regulations which restrict their hours of operation.
For instance, at Washington’s National Airport no jet traffic is allowed from
11 pm to 7 am. Other airports restrict the use of certain runways. One estimate
is that noise restrictions reduce possible airport use by 20 percent. The
profitable cargo trade is especially affected by night restrictions. In the case
of airports, jet engines may be modified to reduce their noise level, or insulation
（隔音）from air traffic noise may be provided by the purchase of land around
airports or the insulation of buildings. One estimate is that $5.7 billion would
be required to equip all existing jet engines with noise control devices. However,
considering the current state of the art, even taking this step will not reduce
noise levels at all points to acceptable values. Some combination of methods is
probably necessary. If all aircraft were made quieter by existing methods, there
would be a number of economic benefits. An increase in airport capacity would
occur. Property values near airports might rise. Transportation costs to and from
airports could be reduced since the airports now could be located closer to
population centers. Much research still needs to be done on the economic aspects
of noise reduction and noise effects. Although some of the effects of noise
pollution are known, more must be discovered about its effects on health,
productivity, property values and the quality of life. Furthermore, the cost of
noise pollution control to the economy as a whole needs to be investigated. The
public must be alerted to the dangers and economic costs of noise pollution so
that people may make intelligent choices and exert appropriate pressures.
21.There is no jet traffic at Washington’s National Airport from 11 pm to 7 am
because ____________.
A、it is extremely dangerous to fly in the dark
B、noise regulations restrict the hours of airport operation
C、some of its runways are not in good condition
D、cargo planes produce disturbing noises
22."The current state of the art"（in Para.2）means ____________.
A、a developed sense of beauty
B、the volume of present-day traffic
C、the most recently developed technology
D、insulation of air traffic noise
23.Noise reduction could lead to ____________.
A、increased airport capacity
B、lower property values
C、effective modification of existing jet engines
D、more transportation costs to and from airports
24.What is NOT mentioned in the passage?
A、Psychological strain.
B、Handling capacity of cargo.
C、Measures for noise reduction.
D、Public pressures.
25.The author of the passage is concerned primarily with ____________.
A、the effects of noiseon the quality of life
B、the role of air traffic restrictions
C、the production of quieter engines
D、the economic aspects of noise reduction