更多"The problem of pollution as well as"的相关试题:
[单项选择]To return to the problem of water pollution , I’d like you to look at a study () in Australia in 2012.
A. having conducted
B. to be conducted
C. conducting
D. conducted
[单项选择]Once the problem of the engine(),all other problems will be readily solved.
A. solve
B. solved
C. is solved
D. will be solved
[单项选择]
Effects of Environmental
Pollution
If pollution continues to increase at
the present rate, formation of aerosols (浮质) in the atmosphere will cause the
onset (开始) of an ice age in about fifty years’ time. This conclusion, reached by
Dr. S.I. Rasool and Dr. S.H. Schneider of the United States Goddard Space Flight
Centre, answers the apparently conflicting questions of whether an increase in
the carbon dioxide (二氧化碳) content of the atmosphere will cause the Earth to warm
up or increasing the aerosol content will cause it to cool down. The Americans
have shown conclusively that the aerosol question is dominant.
Two specters haunting conservationists have been the prospect that environmental
pollution might lead to the planet’s becoming unbearably hot or cold. One of
these ghosts has now been laid. Because it seems that even an increase in the
amount of carbon dioxide in the atmosphere to eight times its present value will
produce an increase in temperature of only 2℃, which would take place over
several thousand years. But the other problem now looms larger than
ever.
Aerosols are collections of small liquid or solid
particles dispersed in air or some other medium. The particles are all so tiny
that each is composed of only a few hundred atoms. Because of this they can
float in the air for a very long time. Perhaps the most commonly experienced
aerosol is industrial smog (烟雾) of the kind that plagued London in the 1950s and
is an even greater problem in Los Angeles today. These collections of aerosols
reflect the Sun’s heat and thereby cause the Earth to cool.
Dr.
Rasool and Dr. Schneider have calculated the exact effect of a dust aerosol
layer just above the Earth’s surface in the temperature of the planet. As the
layer builds up, the present delicate balance between the amount of heat
absorbed from the Sun and the amount radiated from the Earth is disturbed. The
aerosol layer not only reflects much of the Sun’s light but also transmits the
infrared (红外线的) radiation from below. So, while the heat input to the surface
drops, the loss of heat remains high until the planet cools to a new balanced
state.
Within fifty years, if no steps are taken to stop the
spread of aerosols in the atmosphere, a cooling of the Earth by as much as 3.5℃
seems inevitable. If that lasts for only a few years it would start another ice
age, and because the growing ice caps at each pole would themselves reflect much
of the Sun’s radiation it would probably continue to develop even if the aerosol
layer were destroyed.
The only bright spot in this gloomy
forecast lies in the hope expressed by Dr. Rasool and Dr. Schneider that nuclear
power may replace fossil fuels in time to prevent the aerosol content of the
atmosphere from becoming critical.The author’s main purpose in writing the article is to warn of ______.
A. warm weather
B. hot weather
C. a new ice age
D. a new iceberg
[单项选择]Noise pollution is the worst kind of pollution.
A. Right.
B. Wrong.
C. Doesn’t say.
[单项选择]In order to grow well, the Blue Sprace, like other pine trees, ______ a temperate climate.
A. require
B. requires
C. is required
D. that requires
[单项选择]They are well ______ with each other since they once studied in the same university
A. informed
B. accustomed
C. acknowledged
D. acquainted
[单项选择]John as well as the other children who ______ no parents ______ good care of in the village.
A. have; is being taken
B. have; has taken
C. has; is taken
D. has; have been taken
[单项选择]They are well_________ with each other since they once studied in the same university.
A. recognized
B. accustomed
C. informed
D. acquainted
[单选题]If the transponder display is jammed due several aircraft close to each other, the controller can instruct one aircraft to set transponder _______ .
A.OFF
B.ON
C.STANDBY
D.TEST
[单项选择]People can do nothing about pollution.
A. Right.
B. Wrong.
C. Doesn’t say.
[单项选择]
Passage Five
Scientists claim that air pollution causes a decline in the world’s average air temperature. In order to prove that theory, ecologists have turned to historical data in relation to especially huge volcanic eruptions. They suspect that volcanoes effect weather changes that are similar to air pollution.
One source of information is the effect of the eruption of Tambora, a volcano in Sumbawa, the Dutch East Indies (the former name of the Republic of Indonesia), in April 1815. The largest recorded volcanic emption, Tambora threw 150 million tom of fine ash into the stratosphere. The ash from a volcano spreads worldwide in a few days and remains in the air for years. Its effect is to turn incoming solar radiation into space and thus cool the earth. For example, records of weather in England show that between April and November 1815, the average temperature had fallen 4.5°F. During the next twenty-four months, England suffered one of the co
A. England's proximity to the North Sea
B. Volcanic ash in the atmosphere
C. Floorings in the area
D. Pollution caused by the International Revolution