We can learn from Paragraph 3 that economics today highlights______.
A．the pure study of the practice of using resources to the best effect
B．its practical insights into the real-world economy
C．the rational distribution of economic resources in the marketplace
D．the management ability development of businessmen

未分类题According to Paragraphs 2 and 3, Glaeser most probably agrees______.A．concentrated populations hinder the development of citiesB．city pollution is posing a threat to surrounding suburbsC．suburbs develop at the expenses of environmentD．environmentalists are wrong in opposing building in temperate areas

未分类题The privacy bill of rights is meant to______.A．clamp down web surfers' s dishonest behavioursB．restrict internet firms' control over informationC．give American government control over informationD．ease the tension between digital marketers and web users

未分类题Whats the response of the online-advertising industry towards the formal 'do not track system'?A．A gentle persuasioaB．A stiff resistance.C．A forced surrender.D．A combination of tough and soft.

未分类题The author suggests that the discussion about food security should stress______.A．promoting a healthy and humane lifestyleB．reducing the consumption of animal productsC．advancing the globalization of economyD．redefining our priorities and pursuing goals

未分类题The author tends to think that the path to novel ideas lies in______.A．critical thinkingB．cooperation with othersC．independent endeavorD．ambitious goals

未分类题Scientists interest in three-parent children conies from the desire of eliminating______.A．a rare and life-threatening inherited diseaseB．a huge number of rarely-occurring inherited diseasesC．the genetic influence from unhealthy parentsD．mutations in the nuclear DNA

未分类题Which of the following statements about mitochondrial transplantation is true?A．It has been adopted as a medical procedure.B．It has been proved scientifically feasible.C．It is currently regarded as an illegal act.D．It involves artificial DNA modification.

未分类题What is the authors attitude towards the public 'uggh!' factor?

未分类题Why does the writer say 'You might be forgiven for thinking that...'?A．Solving the mystery of sleeping and waking requires new insights.B．Most of the other things people do regularly are biologically straightforward.C．The problem sounds rather grand.D．We still lack for progress though we've spent much more time studying it.

未分类题______, if he doesnt learn he knows nothing.A．A man is ever so cleverB．Be a man ever so cleverC．So clever as a man ever isD．No matter how a man is clever

未分类题If one travels on the Mediterranean cruise in the future,A．he she will become a cheapskate.B．it will cost him her more money.C．it will become more economical.D．there will be no free services.

未分类题You will see to______the engine does not get out of order.A．thatB．howeverC．it thatD．which

未分类题The authors biggest worry about using nuclear energy is that_____.A．it will do great harm to the inadequate reserves of coalB．it is deadly if terrorists attack a nuclear plantC．it will limit the development of many other alternativesD．there will be a wider gap between developed and developing countries

未分类题______ when Shanghai was the paradise for imperialist adventurers.A．Gone are the daysB．Are the days goneC．Gone the days areD．Are gone the days

未分类题She______not have seen you yesterday, for she was not there.A．mightB．couldC．shouldD．must