找考题网-背景图

单项选择题

A．hopefulB．defeatedC．conscientiousD．uncertainThe underl……

The underlined word "upbeat" in paragraph 2 probably means ______.

A．hopeful
B．defeated
C．conscientious
D．uncertain

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热门试题

单项选择题The author believes that more houses were bought last year because______.

A．the economic recession was less serious
B．many people earned more before
C．the interest rate was very low
D．real-estate developers lowered their prices

单项选择题The weekly unemployment data show that ______.

A．more unemployed are being employed now
B．less workers are being dismissed now
C．workers are being better paid now
D．workers are more confident about their income now

单项选择题The author discusses computing machines in the first paragraph primarily in order to ______.

A．indicate the dangers inherent in relying to a great extent on machines
B．illustrate his views about the approach of mathematicians to problem solving
C．compare the work of mathematicians with that of computer programmers
D．provide one definition of intelligence

单项选择题The author suggests that a mathematician asked to solve a problem in an ill-defined situation would first attempt to ______.

A．identify an analogous situation
B．simplify and define the situation
C．vary the underlying assumptions of a description of the situation
D．determine what use would be made of the solution provided

单项选择题According to the passage, scientists are skeptical toward their equations because scientists ______.

A．work to explain real, rather than theoretical or simplified situations
B．know that well-defined problems are often the most difficult to solve
C．are unable to express their data in terms of multiple variables
D．are unwilling to relax the axioms they have developed