A.Brainshrinkage usually begins when a person is 66 years olD.
B.Thebrain of an adult person Shrinks 2.5% every 10 years.
C.Thecerebrospinal fluid of a person with more years of education may increase onlyslightly.
D.Thecerebrospinal fluid of a person can imply the severity of mental decline.
A.Education level can help measure people's mental capacity.
B.Education is the direct factor preventing mental decline.
C.Well-educated people are often healthy.
D.Education is related to people's overall health via other things.
A.enhance mental development
B.protect the brain from mental decline
C.prevent the brain from shrinking
D.compensate for brain shrinkage
A.requiring a different technique from the one in which he was qualified
B.different in nature from routine investigations
C.moredifficult than his usual duties
D.forcing him to leave his usual headquarters