大学英语四级分类模拟题353
(总分100,考试时间90分钟)
Reading Comprehension
The days, many large city buildings are equipped with their own air-conditioning systems. The systems help keep the buildings cool, but they can also damage the environment. Since they u a lot of electricity, for instance, they contribute indirectly to global warming. In addition, the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons, or CFCs, that are believed to damage the Earth"s ozone layer. Recently, though, a system has been built in the city of Toronto, Canada, that cools buildings with little damage to the environment.
脾胃不好的人怎么调理In the traditional air-conditioning systems found in most large buildings, water is pumped through the building in a continuous cycle. The water is first cooled to a temperature of 4℃ in machines called chillers. It is then nt to individual units that cool the air in each room. A
s the water flows through the building, it gradually becomes warmer. Finally, it reaches the roof, where it is left to cool down naturally in a water tower. After that it is returned to the chillers, where the cycle begins again.
Toronto lies on the shore of Lake Ontario, one of North America"s Great Lakes, and the new system makes u of cold water taken from about 80 meters below the surface of the lake. At this depth, the water in the lake remains at 4℃ all year round. This is exactly the temperature to which the water in air-conditioning systems is cooled. However, the water from the lake is not pumped directly into the air-conditioning systems. Instead, it is ud to cool the water that is already inside the air-conditioning systems. After that, the lake water is added to the city"s ordinary water supply.
Enwave, **pany that developed this deep-lake cooling system, says that it us 75 percent less energy than traditional air conditioning. And since no CFCs are ud, no damage can be caud to the ozone layer. Not every city is located next to a large lake, but experts believe that systems like the one being ud in Toronto could be built elwhere by using other natural sources of cold water.
1. What is one problem with traditional air-conditioning systems?
A. The chemicals they u sometimes pollute the water supply.
B. They often damage the buildings that they are trying to cool.
C. There are not enough CFCs in the world to cool all the buildings.
建筑合同范本D. The method they u to cool water is thought to harm the ozone layer.
2. What is the function of the chillers in a traditional air-conditioning system?
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A. They pump the air continuously to the units in each room.
B. They lower the temperature of the water in the system.
C. They help the water cool down naturally on the roof.
D. They gradually clean the water as it flows through the building.
电压力锅维修3. What happens in the end to the water from Lake Ontario?
猜谜游戏A. It is ud by the residents of Toronto.
B. It is returned to a place deep in the lake.
C. It is cooled down before being ud again.
D. It is added to the water inside air-conditioning systems.
4. What is one advantage of Enwave"s new system?
A. It keeps buildings much cooler than other methods.
B. It can be ud by large cities anywhere in the world.
C. It is much more energy-efficient than traditional systems.
D. It keeps water from being ud for more than one purpo.
5. Which of the following is true?
A. Enwave"s system is said to work only in cities located near the Great Lakes.红烧鸡腿怎么烧
天津高校排名B. The water deep in Lake Ontario always remains at the same temperature.
C. Experts warn that the u of CFCs in Enwave"s system will add to global warming.
D. Toronto is now arching for new natural sources of water to u in its water supply.
British psychologists have found evidence of a link between excessive Internet u and depression, a rearch has shown.
Leeds University rearchers, writing in thePsychopathologyjournal, said a small proportion of Internet urs were clasd as Internet addicts and that people in this group were more likely to be depresd than non-addicted urs.
The article on the relationship between excessive Internet u and depression, a questionnaire-bad study of 1,319 young people and adults, ud data gathered from respondents to links placed on UK-bad social networking sites.
The respondents answered questions about how much time they spent on the Internet an
d what they ud it for; they **pleted the Beck Depression Inventory— a ries of questions designed to measure the verity of depression.
The six-page report, by the university"s Institute of Psychological Sciences, said 18 of the people **pleted the questionnaire were Internet addicts.
