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A device that stops drivers form falling asleep at the wheel is about to undergo testing at Department of Transport laboratories and could go on sale within 12 months.
The system, called Driver Alert, aims to reduce deadly road accidents by 20% - 40% that are caused by tiredness. Airline pilots can also use it to reduce the 30% of all pilot-error accidents that are related to fatigue.
Driver Alert is based on a computerized wristband. The device, worn by drivers or pilots, gives out a sound about every four minutes during a car journey. After each sound the driver must respond by squeezing the steering wheel (方向盤). A sensor in the wristband detects this pressing action and measures the time between the sound the driver’s response.
Tiredness is directly related to a driver’s response time. Usually, a watchful driver would take about 400 milliseconds to respond, but once that falls to more than 500 milliseconds, it suggests that the driver is getting sleepy.
In such cases the device gives out more regular and louder sounds, showing that the driver should open a window or stop for a rest. If the driver’s response continues to slow down, the sounds become more frequent until a nonstop alarm warns that the driver must stop as soon as possible.
The device has been delivered to the department’s laboratories for testing. If these tests, scheduled for six months’ time, are successful, the makers will bring the product to market within about a year.
小題1:According to the text, Driver Alert ______.
A.aims to reduce tiredness-related accidents
B.has gone through testing at laboratories
C.aims to prevent drivers form sleeping
D.has been on sale for 12 months
小題2:How should a driver respond to the sounds from Driver Alert?
A.By sounding a warning.B.By touching the wristband.
C.By checking the driving time.D.By pressing the steering wheel.
小題3:We can learn form the text that the driver needs to stop for a break when his response time is ______.
A.about 400 millisecondsB.below 500 milliseconds
C.over 500 millisecondsD.about 4 minutes
小題4:     When the driver gets sleepy while driving, Driver Alert ______.
A.moves more regularlyB.stops working properly
C.opens the window for the driverD.sounds more frequently and loudly

小題1:A
小題2:D
小題3:C
小題4:D

小題1:本題考查根據文章細節(jié)進行推理判斷的能力。根據第二段中的第一句話“The system, called Driver Alert, aims to reduce deadly road accidents by 20% - 40% that are caused by tiredness 可得出正確選項為A。根據最后一段“If these tests, scheduled for six months time, are successful, the makers will bring the product to market within about a year”得知這種產品正處于實驗階段,要在12個月后上市,故排除B、D。而選項C只是這種產品的表面作用。
小題2:本題考查理解細節(jié)信息的能力。根據第三段中的“after each sound the driver must respond by squeezing steering wheel”判斷出D項為最佳答案。
小題3:本題考查根據文章細節(jié)進行推理判斷的能力。由第四段中的“but once that falls to more than 500 milliseconds, it suggests that the driver is getting sleepy”以及第五段中的第一句話“In such cases the device gives out more regular and louder sounds, showing that the driver should open a window or stop for a rest”可判斷出,只有當司機反應的時間超過500 milliseconds 時,司機就得停下來休息一下。
小題4:本題考查理解細節(jié)信息的能力。根據第五段的第一話“In such cases the device gives out more regular and louder sounds, showing that the driver should open a window or stop for a rest”可判斷出,當司機打盹時,這種裝置就會不停地大聲地叫。
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