Electric insulation is made of organic substances and so gradually______with ageA.deterior

A.对供冷供热管线进行保温 Making thermal insulation for cooling and heating pipelines

B.以矿产资源代替废金属资源生产金属材料 Producing metal materials with mineral resource instead of metal scrapes

C.长距离输送电力 Long distance transmission of electric power

D.尽多采用空调系统 Using air conditioning system as much as possible

Local councils in Britain encourage certain aspects of green living，such as recycling paper，tin，plastic and glass. They want to reduce the amount of rubbish going into landfill sites(填埋场)，because they are running out of places to dump(倾倒)rubbish. In some areas rubbish for recycling is collected from your doorstep，but in other areas，you have to take it to a special recycling place，such as a bottle bank.

Another way of reducing the amount of rubbish you create is to use reusable products instead of disposable ones. For example，some people use strong shopping bags or boxes for their groceries instead of plastic carrier bags，or use washable nappies instead of disposables.

More people are becoming interested in reducing their carbon footprint-the amount of carbon they use up. They try to reduce their carbon emissions(释放)by cycling，using public transport or an electric car，rather than driving gas-consuming vehicles. Some people choose not to fly for holiday trips because planes are the biggest producers of carbon emissions.

You can make“green”choices when buying food too. It's best to buy food which was locally grown or produced so that it hasn't been imported by air，or shipped by road from far away.

Houses can be environmentally friendly too. It takes less energy to heat a house if it has good insulation(绝缘，隔热)and double glazing(双层玻璃). You can also create your own energy if you have solar panels or a wind turbine fitted though these can be expensive. You can also save water by using a rain water container for washing the car or watering the garden. It's even possible to use a system where“grey water”-water which has been through a tap(水龙头)once already，is used to flush(冲洗)toilets. Some new housing projects are being built specifically to be as environmentally friendly as possible.

The purpose of collecting reusable wastes is to______.

A．save energy consumed in daily life

B．reduce the amount of rubbish dumped

C．create a new way of green living

D．decrease the amount of carbon produced

Passage Three

Questions 31 to 35 are based on the following passage.

In the late 1960's many people in North America turned their attention to environmental problems，and new steel-and-glass skyscrapers(摩天楼)were widely criticized. Scientists pointed out that blocks of tall buildings in a city often overburdens. public transportation and parking lot capacities.

Skyscrapers are also big consumers，and wasters，of electric power. In one recent year. the addition of 17 million square feet of skyscraper office space in New York City raised the peak daily demand for electricity by 120，000 kilowatts-enough to supply the entire city of Albany，New York，for a day.

Glass-walled skyscrapers can be especially wasteful. The heat loss(or gain)through a wall of half-inch plate glass is more than ten times that through a typical brick wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment，builders of skyscrapers have begun to use double-glazed(装上玻璃的)panels of glass，and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. However. mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings.

Skyscrapers put a severe strain on a city's sanitation(卫生)facilities，too. If fully occupied, the two World Trade Center towers in New York City would alone generate 2.25 million gallons of raw wastes each year-as much as a city the size of Stamford，Connecticut，which has a population of more than 109，000.

Skyscrapers also interfere with television reception，block bird flyways，and obstruct air traffic. In Boston in the late 1960's，some people even feared that shadows from skyscrapers would kill the grass on Boston Common.

Still，people continue to build skyscrapers for all the reasons that they have always built them-personal ambition(抱负)pride，and the desire of owners to have the largest possible amount of rentable space.

The main purpose of the passage is to______.

A. compare skyscrapers with other modem structures

B. describe skyscrapers and their effect on the environment

C. advocate the use of masonry(化妆舞会)in the construction of skyscrapers

D. illustrate some architectural designs of skyscrapers

Passage Two

Questions 26 to 30 are based on the following passage.

We all know that humans are damaging the environment, but what can we do about it？ Some people are trying to do their bit to be more environmentally friendly.

Local councils in Britain encourage certain aspects of green living, such as recycling paper, tin, plastic and glass. They want to reduce the amount of rubbish going into landfill sites（填埋场），because they are running out of places to dump（倾倒）rubbish. In some areas rubbish for recycling is collected from your doorstep, but in other areas, you have to take it to a special recycling place, such as a bottle bank.

Another way of reducing the amount of rubbish you create is to use reusable products instead of disposable ones For example, some people use strong shopping bags or boxes for their groceries instead of plastic carrier bags, or use washable nappies instead of disposables.

More people are becoming interested in reducing their carbon footprint—the amount of carbon they use up. They try to reduce their carbon emissions（释放）by cycling, using public transport or an electric car, rather than driving gas-consuming vehicles. Some people choose not to fly for holiday trips because planes are the biggest producers of carbon emissions.

You can make‘green’ choices when buying food too. It's best to buy food which was locally grown or produced so that it hasn't been imported by air, or shipped by road from far away.

Houses can be environmentally friendly too. It takes less energy to heat a house if it has good insulation（绝缘，隔热）and double glazing (双层玻璃）．You can also create your own energy it you have solar panels or a wind turbine fitted though these can be expensive. You can also save water by using a rain water container for washing the car or watering the garden. It's even possible to use a system where‘grey water’—water which has been through a tap（水龙头）once already, is used to flush（冲洗）toilets. Some new housing projects are being built specifically to be as environmentally friendly as possible.

26．The purpose of collecting reusable wastes is to＿．

A．save energy consumed in daily life

B．reduce the amount of rubbish dumped

C．create a new way of green living

D．decrease the amount of carbon produced

A.good insulation

B.bad insulation

C.high insulation power factor

D.a high slot discharge factor

A.教唆

B.创建

C.制度

D.隔绝

A.is good for long term preserving since most insulation is organic and contains some amount

B.lowers the insulation value and is a common cause of fault grounds in idle machines

C.will enhance insulation resistance only if it is no salt

D.reduces the amount of current supplied or drawn by the machine so horsepower is limited

A.Aloneness

B.Isolation

C.Seclusion

D.Integration

A.rcr=k/h/3

B.rcr=k/h

C.rcr=2k/h

D.rcr=k/h/2