[单项选择]Since pollution became a concern in the 1950s, experts have predicted wrongly that the car ______ was about to end.
A. boost
B. boom
C. production
D. prosperity

[单项选择]Since pollution became a concern in the 1950s, experts have predicted wrongly that the car was about to end.
A. boost
B. boom
C. production
D. prosperity

[单项选择]

In the 1950s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our housework. But as useful as computers are, they’re nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior. Never mind something as complex as conversation: the most powerful computers struggle to reliably recognize the shape of an object, the most elementary of tasks for a ten-month-old kid.
A growing group of A1 researchers think they know where the field went wrong. The problem, the scientists say, is that Al has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step programs. A new movement in Al, on the other hand, takes a closer look at the more roundabout way in which nature came up with intelligence. Many of these researchers study evolut
A. are capable of reliably recognizing the shape of an object
B. are close to exhibiting humanlike behavior
C. are not very different in their performance from those of the 50's
D. still cannot communicate with people in a human language

[单项选择]In the 1950s the American "dream" was
A. to have a house
B. to buy a new house in the suburbs
C. to have a big car
D. to buy an apartment in the city

[单项选择]Exp
A. 生产日期
B. 剂量
C. 有效量
D. 最小抑菌浓度
E. 满期

[单项选择]When he lived in Tibet in 1950s, radio was the only means he had to keep of current events in the country.
A. response
B. track
C. record
D. trace

[单项选择]When he lived in Tibet in the 1950s, radio was the only means he had to keep ______ of current events in the country.
A. response
B. track
C. record
D. trace

[单项选择]During the late 1950s, the Brazilian economy ______ forward as heavy industries and basic infrastructure—roads, communications, and construction—expanded.
A. increased
B. splashed
C. surged
D. improved

[单项选择]In the 1950s, classroom violence ______.