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找不到好的英语六级听力练习材料?绝对是你的不二选择。大家平时多用英语磨耳朵，时间长了英语六级听力绝对会有很大的提高。 英语六级听力练习：标准4.5 点击收听 WASHINGTONU.S. regulators are close to approving new standards for enabling vehicles to communicate with each other, hoping the new technology will reduce traffic accidents. Within as little as three years, automakers may be required to equip all new cars with the so-called vehicle-to-vehicle communication devices. Vehicle-to-vehicle, or V2V, is a short-range communication technology that enables vehicles to exchange vital information 10 times per second, about location, speed, acceleration and braking. Cars will be able to calculate the hazard risk within about 300 meters and alert their drivers or even take automatic collision-avoidance action. The drivers will be able to see, hear and even feel the hazard signals through vibration of the seat. The U.S. National Highway Traffic Safety Administration expects the new system to reduce the number of car accidents by as much as 80 percent, especially those where alcohol is not a factor. The U.S. Department of Transportations Greg Winfree said the new technology will change the whole attitude toward car crashes. The way to look at it is the first 50 years of transportation safety were focused on surviving crashes. We see the future as technology that avoids crashes overall, said Winfree. | 
