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　　66．We can make better use of wave energy if we _______.

　　A．shorten its journey to thousands of homes

　　B．build more small power stations on the oceans

　　C．reduce the cost of turning it into electric power

　　D．quicken the steps of producing electricity

　　67．It can be inferred that some day we might not worry about ________.

　　A．air pollution  B．our boat traffic

　　C．our power supply D．our supply of sea fish

　　【实战演练练习二十二】（06安徽卷 D篇）

　　To extinguish (熄灭) different kinds of fires, several types of fire extinguishers have been inventeD．They must be ready for immediate use when fire breaks out. Most portable (手提式的) kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers.

　　Since fuel, oxygen (氧气) and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get.

　　Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used do cover a small fire.

　　A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel.

　　The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.

　　69．If a fire breaks out on a bus, which of the follow should be ready there for you to use?

　　A．Sand    B．Water

　　C．A blanket.   D．An extinguisher.

　　69．To cover a small piece of burning wood with a basin in order to stop the fire is an example of .

　　A．separating the fire  B．reducing the heat

　　C．removing the fuel  D．cutting off the oxygen

　　70．In choosing how to put out a fire, we should first be clear about  .

　　A．when it breaks out B．how it comes about

　　C．what kind it is  D．where it takes place

　　71．What would the author probably discuss in the paragraph that follows?

　　A．Another class of fires B．Another type of extinguishers

　　C．How fires break out. D．How fires can be prevented．

　　【实战演练练习二十三】（06江苏卷 E篇）

　　A new eight-kilometre road is under construction that links the port area with the motorway system. It is expected to carry 20,000 trucks and cars a day, which greatly reduces the overcrowded traffic in the centre of the city. As part of the project, two four-kif0metre road tunnels are being built below the central area of the city, one for traffic to the north and the other for traffic to the south. The two tunnels are about 20 metres below the surface and are 12 metres wide, providing for two lanes of traffic in each direction.

　　In the upper part of the tunnel two air-conditioning pipes remove the waste gas of trucks and cars and keep the quality of air inside the tunnel. The lighting is at the top of the tunnel, practically at its highest point. There will also be electronic signs at frequent intervals (间隔). They show traffic conditions ahead, and can be seen clearly by drivers. The wall is made up of four main elements, which include a waterproofing covering and, on the inside of the tunnel, a concrete lining(混凝土衬砌).

　　Each tunnel is roughly round and the lower part of the tunnel is somewhat flat. The surface of the road lies on the base, which is made of concrete and steel. The drainage system (排水系统), just below the road surface on one aide, removes any extra liquid, particularly water. In the event of fire, the fire main, which is made of steel, pipes water to many fire hydrant stations at regular intervals along the length of the tunnel. The fire main is at the side of the tunnel, and at the level of the road surface. Other systems in the tunnel will include emergency phones.

　　72．Each of the tunnels under construction is ___________.

　　A．eight kilometres long and twenty metres wide

　　B．eight kilometres long and six metres wide

　　C．four kilometres long and twenty metres wide

　　D．four kilometres long and six metres wide

　　73．Which part of the tunnel in the diagram is used to pipe out extra water?

　　A．1．  B．3．  C．5．   D．6．

　　74．Driving in the tunnel, one can know the traffic conditions ahead through ________.

　　A．the lights  B．the electronic signs  C．the trucks and cars   D．the emergency phones

　　75．The passage is mainly about _____________.

　　A．the construction of a road  B．the design of a road

　　C．the construction of two tunnels  D．the design of two tunnels

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