单选题请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large city buildings are equipped with their own air-conditioning systems.These systems help keep the buildings cool，but they can also damage the environment.Since they use a lot of electricity，for ins

题目

单选题

请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large city buildings are equipped with their own air-conditioning systems.These systems help keep the buildings cool，but they can also damage the environment.Since they use 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. 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 sent to individual units that cool the air in each room.As 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 use 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 used 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，the company that developed this deep-lake cooling system，says that it uses 75 percent less energy than traditional air conditioning.And since no CFCs are used，no damage can be caused to the ozone layer.Not every city is located next to a large lake，but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water.What is one advantage of Enwave 's new system?

It keeps buildings much cooler than other methods.

It can be used by large cities anywhere in the world.

It is much more energy-efficient than traditional systems.

It keeps water from being used for more than one purpose.

如果没有搜索结果或未解决您的问题，请直接联系老师获取答案。

相似问题和答案

第1题：

请教:2005年12月大学英语三级考试真题第1大题第3小题如何解答?

【题目描述】

第3题：According to this passage, gestures are__________

A. spoken words

B. a non-language element

C. pictures in a language

D. written language

正确答案：B

第2题：

According to the passage, the screen or cutters are fitted to __ (1)kill bacteria (2)break up the solid waste (3)remove solid matter with large size

A.(1)

B.(2)

C.(2)(3)

D.None of (1)(2)(3) is true

正确答案：B

第3题：

Find the word in the passage which means “ the movement from one place to another of a large group of animals” and write it down here: __________.

正确答案：
82. migration

第4题：

请阅读Passage 1。完成第小题。
Passage 1
African elephants have been slaughtered at alarming rate over the past decade, largely because they are the primary source of the world's ivory. Their population has been dwindled from 1.3 million in 1979 to just 625,000 today, and the rate of killing has been accelerating in recent years because many of the older, bigger tusked animals have already been destroyed. "The poachers now must kill times as many elephants to get the same quantity of ivory," explained Curtis Bohlen,Senior vice president of the World Wildlife Fund.
Though its record on the environment has been spotty so far, the government last week took the lead in a major conservation issue by imposing a ban on ivory imports into the US. The move came just four days after a consortium of conservation groups, including the World Wildlife Fund and Wildlife Conservation International, called for that kind of action, and it made the US the first nation to forbid imports of both raw and finished ivory. The ban, says Bohlen, sends a very clear message to the ivory poachers that the game is over.
In the past African nations have resisted an ivory ban, but increasingly they realized that the decimation of the elephant herds poses a serious threat to their tourist business. Last month Tanzania and several other African countries called for an amendment to the 102 nation Convention on International Trade in Endangered Species that would make the ivory trade illegal worldwide.
The amendment is expected to be approved at an October meeting in Geneva and to go into effect next January. But between now and then, conservationists contend, poachers may go on a rampage,killing elephants wholesale, so nations should unilaterally forbid imports right away. The US government brought that argument, and by week's end the twelve nations European Community had followed with its own ban.

Which of the following is the best title for the passage?
查看材料

A．African Elephants and the Ivory Trade
B．A Bid to Save the Elephant
C．The Poachers
D．Elephants in Danger

答案：B

解析：

文章首先提到非洲象所面I临的困境，接着提到国际组织及美国的反应——禁止进口象牙以拯救大象，终结偷猎行为。由此可见B项是最佳标题。

第5题：

A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a ______.

A.hydraulic current

B.rectilinear current

C.rotary current

D.harmonic current

正确答案：A

第6题：

Which of the following is NOT TRUE in the passage?

A. The two-way radio is like a telephone for Australian farmers.

B. Families on large farms could keep in touch with each other by radios.

C. The two-way radio is like a newspaper for Australian farmers.

D. All the Australians live on dry places, and they use radios in many ways.

正确答案：D

此题为三正一误的细节题。不符合事实的是D。

第7题：

请教:2011年会计从业资格考试《初级电算化》试题二第1大题第21小题如何解答?

【题目描述】

21. 日期1900年1月25日在Excel系统内部储存的是（）

A.25

B.1,25,00

C.1-25-00

D.00,1,25

正确答案：A

答案分析：

因为EXCEL是从1900-1-1开始计算的

因为EXCEL是从1990-1-1开始计算的

A 25因为EXCEL是从1900-1-1开始计算的

第8题：

阅读下面一段课文，回答下列 21～23 小题。

第 21 题解释这段文字中加点字的含义。

暗：

穿：

正确答案：
暗：晦暗。穿：磨穿。

第9题：

请阅读Passage 1。完成第小题。
Passage 1
African elephants have been slaughtered at alarming rate over the past decade, largely because they are the primary source of the world's ivory. Their population has been dwindled from 1.3 million in 1979 to just 625,000 today, and the rate of killing has been accelerating in recent years because many of the older, bigger tusked animals have already been destroyed. "The poachers now must kill times as many elephants to get the same quantity of ivory," explained Curtis Bohlen,Senior vice president of the World Wildlife Fund.
Though its record on the environment has been spotty so far, the government last week took the lead in a major conservation issue by imposing a ban on ivory imports into the US. The move came just four days after a consortium of conservation groups, including the World Wildlife Fund and Wildlife Conservation International, called for that kind of action, and it made the US the first nation to forbid imports of both raw and finished ivory. The ban, says Bohlen, sends a very clear message to the ivory poachers that the game is over.
In the past African nations have resisted an ivory ban, but increasingly they realized that the decimation of the elephant herds poses a serious threat to their tourist business. Last month Tanzania and several other African countries called for an amendment to the 102 nation Convention on International Trade in Endangered Species that would make the ivory trade illegal worldwide.
The amendment is expected to be approved at an October meeting in Geneva and to go into effect next January. But between now and then, conservationists contend, poachers may go on a rampage,killing elephants wholesale, so nations should unilaterally forbid imports right away. The US government brought that argument, and by week's end the twelve nations European Community had followed with its own ban.

According to the passage, "dwindle" (Para.1) means__________.
查看材料

A．decrease
B．enlarge
C．weaken
D．eliminate

答案：A

解析：

根据原文可知，大象的数量在急剧减少，选项中decrease表示“减少”。

第10题：

At least how many tests were carried out by the scientists referred to in this passage

A.Three
B.Two
C.Only one
D.No one knows

答案：A

解析：

请阅读 Passage 1，完成第 21~25小题。Passage 1These days，many large cit

题目

相似问题和答案

更多相关问题

相关内容