46. What happens when a new technology emerges?
- A. It further widens the gap between the old and the young.
- B. It often leads to innovations in other related fields.
- C. It contributes greatly to the advance of society as a whole.
- D. It usually draws different reactions from different age groups.
答案：D
答案句：Attitudes toward new technologies often fall along generational lines. That is, generally, younger people tend to outnumber older people on the front end of a technological shift.
参考译文：对新技术的态度往往因代际而异。也就是说，在技术变革的前沿，年轻人通常比老年人多。
定位线索：题干“new technology emerges”对应首句“new technologies”；文中“younger people tend to outnumber older people”对应选项D“different reactions from different age groups”。
解析：题干问新技术出现时的情况，答案句直接指出态度因代际而异，年轻人多于老年人，即不同年龄群体反应不同，对应D。A项“扩大代沟”无中生有，B、C项与原文无关。
47. What does the author say about the driverless car?
- A. It does not seem to create a generational divide.
- B. It will not necessarily reduce road accidents.
- C. It may start a revolution in the car industry.
- D. It has given rise to unrealistic expectations.
答案：A
答案句：When you look at attitudes toward driverless cars, there doesn't seem to be a clear generational divide. The public overall is split on whether they'd like to use a driverless car.
参考译文：当你审视人们对无人驾驶汽车的态度时，似乎并没有明显的代际分歧。公众对于是否愿意使用无人驾驶汽车总体上是分裂的。
定位线索：题干“driverless car”对应答案句“driverless cars”；文中“doesn't seem to be a clear generational divide”对应选项A“does not seem to create a generational divide”。
解析：答案句直接说明无人驾驶汽车没有明显的代际分歧，与A项同义。B、C、D项在原文中均未提及，属于无中生有。
48. Why does the driverless car appeal to some old people?
- A. It saves their energy.
- B. It helps with their mobility.
- C. It adds to the safety of their travel.
- D. It stirs up their interest in life.
答案：B
答案句：Whereas older generations are sometimes reluctant to adopt new technologies, driverless cars promise real value to these age groups in particular. Older adults, especially those with limited mobility or difficulty driving on their own, are one of the classic use-cases for driverless cars.
参考译文：尽管老一代有时不愿采用新技术，但无人驾驶汽车对这些年龄段的人尤其有实际价值。老年人，尤其是行动不便或难以自行驾驶的人，是无人驾驶汽车的典型使用场景之一。
定位线索：题干“old people”对应答案句“Older adults”；文中“limited mobility”对应选项B“helps with their mobility”。
解析：答案句指出老年人因行动不便而成为无人驾驶汽车的典型用户，说明它能帮助行动不便者，对应B。A、C、D项在原文中无依据。
49. What is likely to affect one's attitude toward the driverless car?
- A. The location of their residence.
- B. The field of their special interest.
- C. The amount of training they received.
- D. The length of their driving experience.
答案：A
答案句：Where a person lives matters, too. More people who lived in cities and suburbs said they wanted to try driverless cars than those who lived in rural areas.
参考译文：一个人住在哪里也很重要。住在城市和郊区的人比住在农村地区的人更想尝试无人驾驶汽车。
定位线索：题干“affect one's attitude”对应答案句“matters”；文中“Where a person lives”对应选项A“The location of their residence”。
解析：答案句明确说明居住地点影响态度，城市和郊区居民比农村居民更感兴趣，对应A。B、C、D项在原文中未提及。