The atmosphere is all the air
surrounding the earth. Without it, we would be forced to seek shelter from the
sun, as there would be no atmosphere to protect us from the sun’s deadly
rays.
Large and powerful, the atmosphere consists of an ocean of
gases hundreds of miles high. It presses down on our bodies with a force of more
than fourteen pounds per square inch. The narrow column of air which rests upon
our shoulders weighs almost 2000 pounds. But our bodies are built in such a way
that this weight does not crush(压碎)us.
In this huge ocean of air
there is more energy than in all the coal, oil, and gas we have on earth.
Electrical energy is collected in the atmosphere as water is collected and
stored in a dam. The existence of electricity in the air has been known for
centuries. But a thorough study of electricity in
A. the total amount of oxygen over the earth
B. mixture of gases surrounding the earth
C. a source of storms
D. the diffusion of waste gas
更多"{{B}}Passage 3{{/B}}
Th"的相关试题:
[单项选择]{{B}}Passage 3{{/B}}
The atmosphere is all the air
surrounding the earth. Without it, we would be forced to seek shelter from the
sun, as there would be no atmosphere to protect us from the sun’s deadly
rays.
Large and powerful, the atmosphere consists of an ocean of
gases hundreds of miles high. It presses down on our bodies with a force of more
than fourteen pounds per square inch. The narrow column of air which rests upon
our shoulders weighs almost 2000 pounds. But our bodies are built in such a way
that this weight does not crush(压碎)us.
In this huge ocean of air
there is more energy than in all the coal, oil, and gas we have on earth.
Electrical energy is collected in the atmosphere as water is collected and
stored in a dam. The existence of electricity in the air has been known for
centuries. But a thorough study of electricity in
A. the atmosphere is important to none.
B. a great deal of damage from the sun’s deadly rays would be done to us, if there were no atmosphere.
C. the atmosphere, as the author described, is the roof under which man can live safely on Earth.
D. electricity in the atmosphere is being studied from every aspect.
[单项选择]{{B}}Passage 2{{/B}}
In the atmosphere, carbon dioxide acts
rather like a one-mirror--the glass in the roof of a green-house which allows
the sun’ s rays to enter but prevents the heat from escaping.
According to a weather expert’ s prediction, the atmosphere will be warmer
in the year 2050 than it is today, if man continues to burn fuels at the present
rate. If this warming up took place, the ice caps in the poles would begin to
melt, thus raising sea level several meters and severely flooding coastal
cities. Also, the increase in atmospheric temperature would lead to great
changes in the climate of the northern hemisphere, possibly resulting in an
alteration of the earth’ s chief food-growing zones.
In the
past, concern about a man-made warming of the earth has concentrated on the
Arctic because the Antarctic is much colder and has a m
A. prevent the sun’ s rays from reaching the earth’ s surface
B. mean a warming up in the Arctic
C. account for great changes in the climate in the northern hemisphere
D. raise the temperature of the earth’ s surface
[单项选择]{{B}}Passage B{{/B}}
| Questions 26 to 30 are based on
the passage you have just heard. | A. Putting a roof on a barn. B. Harvesting water reeds. C. Using stone as a building material. D. Daily farm operations.
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