A device that stops drivers from falling asleep at the wheel is about to undergo(接受) 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（疲勞）.

????????????? 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 and 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.

1.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.

2.We can learn from the text that the driver needs to stop for a break when his response time is ________

A. about 400 milliseconds ????????????? ????????????? B. below 500 milliseconds

C. over 500 milliseconds ????????????? ????????????? D. about 4 minutes

3.When the driver gets sleepy while driving, Driver Alert ______.

A. moves more regularly ????????????? ????????????? ?????????????

B. stops working properly

C. opens the window for the driver ?????????????

D. sounds more frequently and loudly

4.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 from sleeping

D. has been on sale for 12 months

 

【答案】

1.D

2.C

3.D

4.A

【解析】

試題分析：在本文中作者介紹了一種新發(fā)明的、叫driver Alert的汽車裝置，這種裝置每四分鐘發(fā)出一次聲音，司機(jī)要通過按壓方向盤來對此回應(yīng)，以表明司機(jī)沒有困倦，如果反應(yīng)超過標(biāo)準(zhǔn)的時(shí)間，則說明司機(jī)疲勞駕駛，需要停車休息。這種裝置目前正處于試驗(yàn)階段，據(jù)說能減少20%--40%因疲勞而造成的意外。

1.D細(xì)節(jié)理解題。根據(jù)文章第三段After each sound the driver must respond by squeezing the steering wheel(方向盤).可知司機(jī)聽到Driver Alert所發(fā)出的聲音時(shí)要按壓方向盤，答案選D。

2.C細(xì)節(jié)理解題。根據(jù)文章第四段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.可知司機(jī)需要休息的反應(yīng)時(shí)間為500毫秒以上，答案選C。

3.D細(xì)節(jié)理解題。從文章四、五段內(nèi)容可知如果司機(jī)對Driver Alert 的聲音反應(yīng)不及時(shí)，就表明司機(jī)困倦了，在這種情況下這種裝置就會發(fā)生均勻的、很大的聲音以提醒司機(jī)，（In such cases the device gives out more regular and louder sounds）, 故D選項(xiàng)內(nèi)容正確。

4.A細(xì)節(jié)理解題。根據(jù)文章第二段The system, called driver Alert, aims to reduce deadly road accidents by 20%--40% that are caused by tiredness.可知這項(xiàng)裝置的目的在于提醒司機(jī)，以減少因疲勞駕駛而發(fā)生的意外，答案選A。

考點(diǎn)：考查社會科學(xué)類短文閱讀。

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