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单项选择题

As used in the last sentence, the phrase "in short" means_____.

A．in the long run
B．in detail
C．in a word
D．in the end

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热门试题

单项选择题From paragraph 4, we can deduce that_____.

A．the speed of computers is faster than ever
B．scientists encounter unprecedented difficulties
C．the intelligence of computers is more important than the speed
D．there is much room for the improvement of computer intelligence

单项选择题The author's attitude towards intelligent seem to be that_____.

A．opposition
B．approval
C．suspicion
D．indifference

单项选择题When the author says that it' s not crazy to think about the impact of this on evolution, he means_____.

A．the progress in biography is so great that people feel astonished
B．the progress in cryogenics is so great that people feel astonished
C．the progress in information technology has great influence on human
D．the progress in information technology is beneficial to human

单项选择题What are the challenges of space exploration

A．The challenge was developing rockets powerful enough and reliable enough to boost a satellite into orbit.
B．The challenge was building the satellites themselves.
C．Engineers also had to build tracking stations to maintain radio communications with these artificial "moons" as they circled the planet.
D．The development of rockets and satellites.

单项选择题What have given mankind a new viewpoint on the earth and its neighbors in space

A．Those explorations.
B．The advance of new technologies.
C．Spacecraft studies.
D．Scientific discoveries.