【单选题】The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as _____.
【单选题】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 a...
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