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Fluid intelligence is the type of intelligence that involves short-term memory and the ability to think quickly, logically, and abstractly in order to solve new problem. It (1)in young adulthood (between the ages of 20 and 30), levels out for a period of time, and then (2)starts to slowly decline as we age. But (3)aging is inevitable, scientists are finding out that certain changes in brain function may not be.
One study found that muscle loss and the (4)of body fat around the abdomen, which often begin in middle age and continue into advanced age, are associated with a decline in fluid intelligence. This suggests the (5)  that lifestyle factors, such as the type of diet you follow and the type and amount of exercise you get throughout the years to maintain more lean muscle, might help prevent or (6) this type of decline.
The researchers looked at data that (7)measurements of lean muscle, abdominal fat and subcutaneous fat (the type of fat you can see and grab hold of) from more than 4,000 middle-to-older-aged men and women and (8)that data to reported changes in fluid intelligence over a six-year period. They found that middle-aged people (9)higher measures of abdominal fat(10)worse on measures of fluid intelligence as the years(11).
For women, the association may be(12)to changes in immunity that resulted from excess abdominal fat; in men, the immune system did not appear to be (13). Future studies could (14)these differences and perhaps lead to different(15)for men and women.
(16) there are steps you can (17)to help reduce abdominal fat and maintain lean muscle mass as you age in order to protect both your physical and mental(18). The two most generally recommended lifestyle approaches are maintaining or increasing your (19)of aerobic exercise and following a Mediterranean-style (20) that is high in fiber from whole grains, vegetables, and other plant foods and eliminates highly processed foods. If you carry extra belly fat, speak with your health care provider to determine a plan that is best for you.

问题1选项
A.pauses
B.return
C.peaks
D.fades
问题2选项
A.alternatively
B.formally
C.accidentally
D.generally
问题3选项
A.while
B.since
C.once
D.until
问题4选项
A.detection
B.accumulation
C.consumption
D.separation
问题5选项
A.possibility
B.decision
C.goal
D.requirement
问题6选项
A.delay
B.ensure
C.seek
D.utilize
问题7选项
A.modified
B.supported
C.included
D.predicted
问题8选项
A.devoted
B.compared
C.converted
D.applied
问题9选项
A.with
B.above
C.by
D.against
问题10选项
A.lived
B.managed
C.scored
D.played
问题11选项
A.ran out
B.set off
C.drew in
D.went by
问题12选项
A.superior
B.attributable
C.parallel
D.resistant
问题13选项
A.restored
B.isolated
C.involved
D.controlled
问题14选项
A.alter
B.spread
C.remove
D.explain
问题15选项
A.compensations
B.symptoms
C.demands
D.treatments
问题16选项
A.Likewise
B.Meanwhile
C.Therefore
D.Instead
问题17选项
A.change
B.watch
C.count
D.take
问题18选项
A.well-being
B.process
C.formation
D.coordination
问题19选项
A.level
B.love
C.knowledge
D.space
问题20选项
A.design
B.routine
C.diet
D.prescription
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