一般而言，个体在中等动机强度下活动效率最高，动机过高或过低都会降低活动效率。()
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The author proposes that we should______.
A. spare no efforts to increase life expectancy
B. be aware of the rapid graying of our society
C. apply science and technology in everyday life
D. try our best to improve the lives of old people
The study made by the author and Corrinna shows that ______.
A. older people focus more on positive information
B. there are more positive features than negative ones
C. younger people focus more on negative information
D. it is easier for positive information to be remembered
The expression "moving offshore" in paragraph 7 refers to the fact that many global firms______.
A. have moved out of America
B. have moved to both India and China
C. become interested in tertiary-education systems
D. are seeking talented people in developing countries
"Hoi polloi"most probably refers to ______.
A. the populace
B. professionals
C. legendary figures
D. people seeking divorce
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