The third paragraph tells us that higher levels of education______.
A．can prevent Alzheimer's
B．are related to greater mental awareness in youth
C．are related to lower levels of mental decline in old age
D．is only one of many factors that can slow the rate of mental decline

未分类题In this text the authors main intent is to______.A．underscore the difficulties related to agingB．critique different theories of mental decline in old ageC．argue that old age need not be a barrier to great accomplishmentsD．understand how people can counter the impacts of aging on mental faculties

未分类题It is indicated in the first two paragraphs that______.A．the debt proportion in GDP of emerging economies is much higher than that of advanced economiesB．all advanced economies are facing low growth and high unemployment caused by the financial crisisC．public finances are a reflection of the difference in growth rate between emerging and advanced economiesD．economic crisis is less severe and interrelated now than before

未分类题The underlined word 'volatility' in Paragraph 2 refers to______.A．stabilityB．fluctuationC．surgingD．filling

未分类题Currently, most job opportunities for high school students and graduates are available in______.A．the high-tech sectorB．temporary employmentC．retail storesD．amusement parks

未分类题According to the text, most great thinkers and artists______.A．were productive even in their later yearsB．were most successful before the age of 30C．made contributions regardless of ageD．contributed the most before old age

未分类题如果一幅图像能够表示的颜色数量为256种，则该图像的量化位数是()位。A. 4B.1C.256D. 8

未分类题The phrase 'put Estonia on the map'(line 5, para. 4)most likely means______.A．gain international fame for the Estonian governmentB．confirm Estonia's post-Soviet independenceC．garner respect for genetics research conducted in EstoniaD．bring global recognition to this little-known country

未分类题What does the quoted content of the last paragraph means?A．The algorithm of computers guided some fund companies' investment.B．Machines cannot tell the hidden meaning of people's words.C．The slang about dentist confuses computers.D．People are good at analyzing the meaning and mood of a text.

未分类题On which of the following would the author most probably agree?A．Washington D.C. is subject to the widest income disparity in America.B．D.C. government should pay more attention to the interests of the needy.C．The trend that rich families tend to move in D.C. should be curbed.D．The poorest family should move out of Washington.

未分类题The authors attitude towards the possibility of closing the gap in Washington is one of______.A．pessimismB．optimismC．skepticismD．objectiveness

单项选择题按照国际电信联盟（ITU）对媒体的定义，图像编码属于（）。

A.存储媒体
B.显示媒体
C.感觉媒体
D.表示媒体

未分类题The income disparity Washington D.C. confronts is not characterized by______.A．severityB．resilienceC．persistenceD．arduousness

未分类题Which of the following is true in the case of David Garrison ?A．He holds a guarded prospect of bridging the income gap in a short period.B．Current economic progress and recovery will be able to help out the poor.C．He argues that this income disparity originates from multiple factors.D．Rich families tend to move into the greater Washington metro area.

未分类题The author suggests that the most valuable resource in todays society is______.A．technologyB．economic assetsC．access to informationD．time

未分类题According to the imaginary history simulated in the game, 9 11 may be prevented if______.A．former government officials paid more attention on the alarm of Al QaedaB．the leaders of Al Qaeda were captured in covert operationsC．the Bush Administration raised national defense expenditureD．the U.S. well dealt with the popular fury of the Muslim world