[多项选择] Is Environmental Pollution a Crime
1．破坏生态环境是一种犯罪行为
2．破坏生态给人类造成经济损失及生存危机
3．保护环境人人有责

[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]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 year’s time. This conclusion reached by Dr S. I. Rasoo1 and Dr S. H. Scheider of the United States Goddard Space Flight Center, answer the apparently conflicting questions of whether an increase in the carbon dioxide (二氧化碳) content of the atmosphere will cause the Earth warm up or increasing 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.

[单项选择]A．Environmental pollution and protection.
B．Taxes and services for the public.
C．Police’s efforts to protect people.
D．People’s attitude toward taxes.

[单项选择]根据中国现行法律规定，破坏生态环境的技术属于（）
A. 禁止进口的技术
B. 限制进口的技术
C. 自由进口的技术
D. 鼓励进口的技术

[单项选择]某一城市有两大支柱产业：传统手工业和旅游业。发展传统手工业将不可避免地导致污染，从而破坏生态环境，但良好的生态环境又是发展旅游业的必要条件。
以下哪项能作为结论从上述断定中推出
A. 市政府应大力加强对生态环境的保护。
B. 这城市无法同时发展传统手工业和旅游业。
C. 应该用其他产业代替传统手工业和旅游业。
D. 这城市的经济收入主要靠传统手工业。
E. 如果生态环境破坏了，传统手工业就不能发展。

[单项选择]废旧电池是一种常见的污染物，是破坏生态环境的“杀手”。下列关于废旧电池的说法，错误的是______。
A. 废旧电池含有大量的重金属
B. 废旧电池无法回收再利用，应集中处理
C. 有害物质会从废旧电池中溢出，污染水和土壤
D. 废旧电池如果随意丢弃，其中的有害物质会通过各种媒介进入人体

[简答题] Computer Crime A computer crime is generally defined as one that involves the use of computers and software for illegal purposes. This doesn’’t mean that all the crimes are new types of crime. On the contrary, many of these crimes, such as embezzlement of funds, the alteration of records, theft, vandalism, sabotage, and terrorism, can be committed without a computer. But with a computer, there offenses can be carried out more quickly and with less chance that the person responsible for the crime will be discovered. Computer crimes have been on the rise for the last twelve years. Just how much their computer crimes cost the American public is in dispute, but estimates range from $ 3 billion to $ 5 billion annually. Even the FBI, which attempts to keep track of the growth or decline to all kinds of crimes, is unable to say precisely how large a loss is involved; however, it estimates that the average takes from a company hit by computer crime is $ 60