[不定项选择题]Everyone becomes a little more forgetful as they get older, but men's minds decline more than women's, according to the results of a worldwide survey. Certain differences seem to be inherent in male and female brains: Men are better at maintaining and dealing with mental images (useful in mathematical reasoning and spatial skills ) , while women tend to excel (擅长) at recalling information from their brain's files (helpful with language skills and remembering the locations of objects). Many studies have looked for a connection between sex and the amount of mental decline ( 衰退) people experience as they age, but the results have been mixed. Some studies found more age-related decline in men than in women, while others saw the opposite or even no relationship at all between sex and mental decline．Those results could be improper because the studies involved older people, and women live longer than men: The men tested are the survivors, "so they're the ones that may not have shown such cognitive decline," said study team leader Elizabeth of the University of Warwick in England. People surveyed completed four tasks that tested sex-related cognitive skills: matching an object to its rotated form, matching lines shown from the same angle, typing as many words in a particular category (范畴) as possible in the given time, e.g．"object usually colored gray", and recalling the location of objects in a line drawing．The first two were tasks at which men usually excel; the latter were typically dominated by women. Within each age group studied, men and women performed better in their separate categories on average．And though performance declined with age for both genders, women showed obviously less decline than men overall. One important factor that affects the correctness of the results is that__________ . A.the old men tested may not have shown such cognitive decline B.people surveyed are all ol
A.
B.people taking part in this test came from all over the worl
C.
D.women live longer than men

[不定项选择题]Everyone becomes a little more forgetful as they get older, but men's minds decline more than women's, according to the results of a worldwide survey. Certain differences seem to be inherent in male and female brains: Men are better at maintaining and dealing with mental images (useful in mathematical reasoning and spatial skills ) , while women tend to excel (擅长) at recalling information from their brain's files (helpful with language skills and remembering the locations of objects). Many studies have looked for a connection between sex and the amount of mental decline ( 衰退) people experience as they age, but the results have been mixed. Some studies found more age-related decline in men than in women, while others saw the opposite or even no relationship at all between sex and mental decline．Those results could be improper because the studies involved older people, and women live longer than men: The men tested are the survivors, "so they're the ones that may not have shown such cognitive decline," said study team leader Elizabeth of the University of Warwick in England. People surveyed completed four tasks that tested sex-related cognitive skills: matching an object to its rotated form, matching lines shown from the same angle, typing as many words in a particular category (范畴) as possible in the given time, e.g．"object usually colored gray", and recalling the location of objects in a line drawing．The first two were tasks at which men usually excel; the latter were typically dominated by women. Within each age group studied, men and women performed better in their separate categories on average．And though performance declined with age for both genders, women showed obviously less decline than men overall. The author aims to tell us that__________ .
A.women's minds perform better than men's
B.men's minds decline more with age
C.everyone becomes a little more forgetful as they get older
D.a survey on human's mind decline was done recently

[不定项选择题]共用题干 More About Alzheimer's Disease
Scientists have developed skin tests that may be used in the future to identify people with Alzheimer's disease and may ultimately allow physicians to predict_______(51)is at risk of getting this neurological disorder.
The only current means of_____(52)the disease in a living patient is a long and expensive series of tests that eliminate every other cause of dementia（痴呆）.
"Since Alois Alzheimer described the_____(53)nearly a century ago,people have been trying to find a way to_____(54)diagnose it in its early stages,"said Patricia Grady,acting director of the National Institute of Neurological Disorders and Stroke in Bethesda,Maryland."This discovery,if_____(55),could prove a big step forward in our efforts to deal with and understand the disease."
Alzheimer ' 5 is the single greatest _________ ( 56 ) of mental deterioration（退化）in older people, affecting between 2.5 million and 4 million people in the United States_____(57).The devastating disorder gradually destroys memory and the ability to function,and eventually causes death.There is currently no known______（58)for the disease.
Researches______(59)that the skin cells of Alzheimer's patients have defects that interfere with their ability to regulate the flow of potassium（钾）in and out of the cells.The fact that the cell defects are present in the skin suggests that Alzheimer's______(60)from physiological changes throughout the body,and that dementia may be the first noticeable effect of these changes as the defects______(61)the cells in the brain,scientists said.
The flow of potassium is especially______(62)in cells responsible for memory formation.The scientists also found two other defects that affect the cells'supply, of calcium（钙）,another critical element.
One test developed by researches calls______(63)growing skin cells in a laboratory culture and then testing them with an electrical detector to determine if the microscopic tunnels that_______(64)the flow of potassium are open.Open potassium channels create a unique electrical signature.
A spokesman for the Alzheimer's Association said that if the validity of the diagnostic test can be proven it would be an important______(65),but cautioned that other promising tests for Alzheimer's have been disappointing. _________65
A.chance
B.concept
C.development
D.decision