請閱讀Passage l。完成第21-25小題。

　　Passage 1

　　A concept car developed by Japanese company Nissan has a breathalyzer-like detection system and other instruments that could help keep drunk or over tired drivers off the road.

　　The car's sensors check odors inside the car and monitor a driver's sweat for traces of alcohol. An in-car computer system can issue an alert or even lock up the ignition system if the driver seems over-the-limit. The air odor sensors are fixed' firmly and deeply in the driver and passenger seats, while a detector in the gear-shift knob measures perspiration from the driver's palm.

　　Other carmakers have developed similar detection systems. For example, Sweden's Volvo has developed a breathalyzer attached to a car's seat belt that drivers must blow into before the engine will start.

　　Nissan's new concept vehicle also includes a dashboard-mounted camera that tracks a driver's alertness by monitoring their eyes. It will sound an alarm and issue a spoken warning in Japanese or English if it judges that the driver needs to pull over and rest.

　　The car technology is still in development, but general manager Kazuhiro Doi says the combination of different detection systems should improve the overall effectiveness of the technology."For example, if the gear-shift sensor was bypassed by a passenger using it instead of the driver, the facial recognition system would still be used," Doi says. Nissan has no specific timetable for marketing the system, but aims to use technology to cut the number of fatalities involving its vehicles to half 1995 levels by 2015.

　　The car's seat belt can also tighten if drowsiness is detected, while an external camera checks that the car is keeping to its lane properly. However, Doi admits that some of the technology, such as the alcohol odor sensor, should be improved. "If you drink one beer, it's going to register, so we need to study what's the appropriate level for the system to activate," he says.

　　In the UK, some research groups are using similar advanced techniques to understand driver behavior and the effectiveness of different road designs.

　　21. Which of the following statements is NOT true of the Japanese concept car?

　　A. It has a sensor system that could issue a warning if the driver is drunk.

　　B. It has sensors that detect traces of alcohol inside the car.

　　C. It has sensors locked up in the ignition system.

　　D. It has a breathalyzer-like detection system.

　　22. What has Volvo developed?

　　A. The same detection system mentioned in the previous paragraph.

　　B. A breathalyzer attached to a car's seat belt.

　　C. A smart car seat belt.

　　D. An intelligent engine.

　　23. What is the function of the camera mentioned in Paragraph 4?

　　A. It monitors the driver's eyes to see if he needs a rest.

　　B. It judges if the driver wants to pull over.

　　C. It judges if the driver wants to take a rest.

　　D. It issues an alarm when the driver speaks.

　　24. According to Doi,__________.

　　A. the overall effectiveness of the detection technology has improved

　　B. Nissan is making a timetable to market the detection system

　　C. it is impossible to improve the'overall effectiveness of the detection system

　　D. Nissan aims to improve the detection technology to reduce the fatality rate

　　25. Which of the following is NOT mentioned in Paragraph 6?

　　A. An external camera checks that the car is going properly.

　　B. The car will automatically keep to its lane.

　　C. The seat belt will tighten when the driver is found drowsy.

　　D. The technology of the alcohol odor sensor should be improved.

　　請閱讀Passage 2。完成第26—30小題。

　　Passage 2

　　If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.

　　Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.

　　Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.

　　When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.

　　26. In the long run, the most difficult problem caused by population growth on earth will probably be the lack of__________.

　　A. food

　　B. oil

　　C. space

　　D. resources

　　27. CarlSagan believes that Venus might be colonized from earth because__________.

　　A. it might be possible to change its atmosphere

　　B. its atmosphere is the same as the earth's

　　C. there is a good supply of water on Venus

　　D. the days on Venus are long enough

　　28. On Venus there is a lot of__________.

　　A. water

　　B. carbon dioxide

　　C. carbon monoxide

　　D. oxygen

　　29. Algae are plants that can__________.

　　A. live in very hot temperatures

　　B. live in very cold temperatures

　　C. manufacture oxygen

　　D. all of the above

　　30. Man can eventually land on Venus only when__________.

　　A. the algae have done their work

　　B. the atmosphere becomes cooler

　　C. there is oxygen

　　D. it rains there

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