更多"If pollution continues to increase "的相关试题:
[单项选择]If pollution continues to increase at the present rate, formation of aerosols in the atmosphere will cause the onset 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 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
A. there is no need to worry about the problem of aerosols
B. the problem of aerosols is much more serious than the problem of carbon dioxide
C. the increase in the amount of carbon dioxide will take place over many years
D. the carbon dioxide content of the atmosphere is decreasing
[单项选择]
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If pollution continues to
increase at the present rate, formation of aerosols in the atmosphere will cause
the onset 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 Center, answers the apparently conflicting question of whether an
increase in the carbon di- oxide 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 meddling with the environment 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 temperatu
A. By absorbing more and more particles.
B. By reflecting much of the sun’s heat.
C. By attracting more and more travelers.
D. By increasing the carbon dioxide content of the atmosphere.
[单项选择]As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the (67) of rushing through life, being on the go from morning till night, it is hard to (68) down. But relaxation is essential for a (69) mind and body.
Stress is natural part of everyday life and there is no way to (70) it. In fact, it is not the bad thing it is often (71) to be. A certain amount of stress is vital to provide (72) and give purpose to life. It is only (73) . the stress gets out of control that it can lead to (74) performance and iii health.
The amount of stress arsons can withstand depends very much (75) the individual. Some people are not afraid of stress, and (76) characters are obviously prime material for managerial responsibilities. Others lose (77) at the first signs of unusual difficulties. When (78) to stress, in whatever form, we react both chem
