[单项选择]Researchers disagree whether the "use it or lose it" philosophy holds for cognitive aging, but there is one evidence that keeping mentally active can slow age-related declines.
At Pennsylvania State University, Sherry Willis and her husband, K. Warner Schaie, have studied 5000 people, some since 1956. People lucky enough to avoid chronic diseases may also fare better in intellectual function, they find, perhaps because chronic diseases can restrict lifestyle and reduce mental stimulation. Similarly, those lucky enough to be relatively affluent also fare better, perhaps because money can buy intellectually stimulating things like travel.
Education helps, too, researchers say because of instills the conviction that you can always learn something new. The Schaie-Willis team also has some other observations. Being in a stable marriage with a stimulating spouse, they say, helps maintain intellectual vigor.
Flexibility counts too. People who stay mentally vibrant are often tho
A. Education
B. Chronic illness
C. Standard of living
D. All of the above

[单项选择]Researchers disagree whether the "use it or lose it" philosophy holds for cognitive aging, but there is one evidence that keeping mentally active can slow age-related declines.
At Pennsylvania State University, Sherry Willis and her husband, K. Warner Schaie, have studied 5000 people, some since 1956. People lucky enough to avoid chronic diseases may also fare better in intellectual function, they find, perhaps because chronic diseases can restrict lifestyle and reduce mental stimulation. Similarly, those lucky enough to be relatively affluent also fare better, perhaps because money can buy intellectually stimulating things like travel.
Education helps, too, researchers say because of instills the conviction that you can always learn something new. The Schaie-Willis team also has some other observations. Being in a stable marriage with a stimulating spouse, they say, helps maintain intellectual vigor.
Flexibility counts too. People who stay mentally vibrant are often tho
A. the role mental stimulation in preventing mental aging,
B. gradual loss of mental skills with normal aging.
C. the relationship between mental function and spatial skills.
D. effective ways to keep intellectual vigor.

[简答题]Whether to use tests, other kinds of information, or both in a particular situation depends, therefore, upon the evidence from experience concerning comparative validity and upon such factors as cost and availability.

[单项选择]People are waiting for ______ of whether the man is innocent or not.
A. prediction
B. perturbation
C. expedition
D. confirmation

[单项选择]Marketing
Mergers agencies find out whether there is a demand for a product and what sort of demand it is. They will want to know if there are competitors to the product they are going to place; who will use it--men, women, or both; will there be only one section of men or women who will use it, would a low price (19) more customers, or would they need to add something to it to make it popular, or change its packaging— (20) it For the (21) to these and other questions they will make a survey--an examination--of the market. The survey most people are (22) with is the questionnaire; where a (23) --a specially selected group of people--are asked questions about products they use: and why they buy them. But market research techniques can be more complicated than this, (24) for example, a group of people discussing a subject, say, (25) hygiene, to find out if a new toothpaste will sell. Tests may be made
A. expensive
B. several
C. free
D. preferred