题目内容
A device that stops drivers from 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 piloterror 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(方向盘). 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)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
(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.
(3)We can learn from the text that the driver needs to stop for a break when his response time ______.
[ ]
A.about 400 milliseconds
B.below 500 milliseconds
C.over 500 milliseconds
D.about 4 minutes
(4)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
解析:
(1) 根据第二段第一句话The system, called Driver Alert, aims to reduce deadly road accidents by 20% 40% that are caused by tiredness,可得知A项正确。(2) 根据第三段中的After each sound the driver must respond by squeezing the steering wheel,可判断出。(3) 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话In such cases the...可判断出,只有当司机反应的时间超过500 milliseconds时,司机就得停下来休息一下。(4) 根据第五段的第一句话“In such cascs thc devicc...”可判断出,当司机打盹时,这种装置就会不停地大叫。A、B、C干扰项意义不成立,文中未提到“超出了事实范围”且“答非所问”。 |
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