According to the passage, a standard economic experience is that______.
A．deficit finance is of value in economic crisis
B．the stock market is in an irrational exuberance
C．markets may fail under some circumstances
D．humans are rational calculators

未分类题What do we learn from the text?A．Information technology is important for the transportation industry.B．The transportation industry has completed the task of using information technology to improve critical systems.C．Many people fail to realize the importance of the transportation industry.D．Many people fail to realize the importance of information technology.

未分类题The example of Britain indicates that______.A．a large proportion of waste is generated by developed countriesB．there are many other kinds of rubbish besides municipal wasteC．mining extraction generates large quantity of wasteD．agricultural waste makes up a large proportion of the total

未分类题The second paragraph mainly demonstrates______.A．space garbage's hazard towards peopleB．that people produce waste of all kinds with large amountC．whether people should take recycling into accountD．Ken Noguchi's five clean-up expeditions

未分类题When does Miralda-Escude estimate the first star appeared?A．75 million years ago.B．14 billion years ago.C．14 billion years after the big bang.D．75 million years after the big bang.

未分类题By mentioning an organization in San Diego, the author intends to______.A．encourage institutions to do interdisciplinary researchesB．state many institutions strive to study set environment's influence on humansC．prove that researches in neuroscience have been in popularityD．advocate that architecture schools should involve introductory neuroscience