Japanese Car Keeps Watch for Drunk Drivers
A concept car developed by Japanese company Nissan1 has a breathalyzer-like detection system and other instruments that could help keep drunk or over tired drivers off the road.
and passenger seats，while a detector in the gear-shift knob measures perspiration from the drivers palm.
Nissans new concept vehicle also includes a dashboard-mounted camera that tracks a drivers 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 rest3.
The cars 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，its going to register，so we need to study whats the appropriate level for the system to activate, he says.
练习：
A It has a sensor system that could issue a warning if the driver is drunk.
C It has sensors locked up in the ignition system.
2. What has Volvo developed?
B A breathalyzer attached to a cars seat belt.
D An intelligent engine.
A It monitors the drivers eyes to see if he needs a rest.
C It judges if the driver wants to take a rest.
4. According to Doi,
B Nissan is making a timetable to market the detection system.
D Nissan aims to improve the detection technology to reduce the fatality rate.
A An external camera checks that the car is going properly.
C The seat belt will tighten when the driver is found drowsy.
答案与题解：
2. B 短文第三段告诉我们，沃尔沃公司也发明了一种相类似的酒精检测装置，安装在保险带上。所以B是正确选择。
4. D 短文第五段说，这种监测技术仍然在发展之中，使用不同的监测系统应能改进这项技术的整体有效性，所以A和C都不是正确选择。该段的最后一句说，日产公司并不准备将这种监测系统推向市场，但它的目标是使用这种技术到2015年将日产车的事故率年减少到 1995年的一半。所以B也不是正确选择，只有D表达了Doi的意思。