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Unit 2 Smart Cars Approximately 40,000 people are killed each year in the United States in traffic accidents. The number of people that are killed or badly (1)______ in car accidents is so vast that we don’t even bother to (2)______ them in the newspapers anymore. Fully half of these fatalities come from drunk drivers, and many others from (3)______ . A smart car could (4)______ most of these car accidents. It can (5)______ if a driver is drunk via electronic sensors that can pick up alcohol vapor in the air, and (6)______ to start up the engine. The car could also alert the police and provide its precise (7)______ if it is stolen. Smart cars have already been built which can monitor one’s driving and the driving (8)______ nearby. Small (9)______ hidden in the bumpers can scan for nearby cars. Should you make a (10)______ driving mistake (e.g., change lanes when there is a car in your “ (11)______ spot”) the computer would sound an immediate warning. At the MIT Media Lab, a (12)______ is already being built which will determine how sleepy you are as you drive, which is especially important for long-distance (13)____________ . The monotonous, almost hypnotic process of (14)____________ the center divider for long hours is a grossly underestimated, (15)____________ . To eliminate this, (16)____________ hidden in the dashboard can be trained on a driver’s (17)____________ . If the driver’s eyelids close for a certain length of time and his or her driving becomes erratic, a computer in the dashboard could alert the driver. 1. __________ 2. __________ 3. __________ 4. __________ 5. __________ 6. __________ 7. __________ 8. __________ 9. __________ 10. __________ 11. __________ 12. __________
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【简答题】( )是指在劳动生产率或全要素生产率不变或提高很少的情况下,主要依靠增加劳动或资本等要素投入数量而实现的经济增长。
【简答题】人口负担系数也称抚养系数,是指人口总体中非劳动年龄人口数与劳动年龄人口数之比,用百分比表示 (人口负担系数=(14岁及以下人口数+65岁及以上人口数)/(15~岁人口数)×100%)。下图为“我国人口负担系数变化图”。读图,回答题。 小题1:下列说法正确的是 A.A阶段劳动力充足 B.B阶段人口负担下降主要是因为我国的经济水平大幅度提高 C.C阶段劳动力数量先下降后上升 D.D阶段人口老龄化很...
【单选题】集约型增长是指在生产要素投入数量不变或增加很少的情况下,主要依靠( )而实现的经济增长。
A.
增加劳动和资本
B.
技术进步或提高生产率
C.
增加劳动或提高生产率
D.
技术进步或增加资本
【判断题】船舶照明系统各种照明灯有一定维护周期,对闪光灯的检查应每一个月就检查一次灯具、导线的完好性,并测量绝缘电阻。
A.
正确
B.
错误
【判断题】8 Different peoples have New Year's celebrations in different ways.
A.
正确
B.
错误
【单选题】船舶照明系统各种照明灯有一定维护周期,对普通照明灯具应每 就要检查一次灯头接线是否老化、断开,同时检查室外灯具水密锈蚀情况,如有损坏要更换。
A.
航行一次
B.
航行两次
C.
半年
D.
一年
【单选题】船舶照明系统各种照明灯有一定维护周期,应每 就要检查一次航行灯、信号灯供电是否正常,故障报警或显示装置是否正常。
A.
航行一次
B.
航行两次
C.
一个月
D.
两个月
【判断题】土质路堤施工必须根据设计断面,分层填筑、分层压实。
A.
正确
B.
错误
【判断题】劳动是指劳动投入的增加,是劳动数量的增加 。( )
A.
正确
B.
错误
【判断题】Different peoples have New Year's celebrations in different ways.
A.
正确
B.
错误
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