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【简答题】According to some researchers，by measuring the levels of NT—proBNP in the blood people may know__________．
【单选题】The Columbia University researchers are the first to use sea-surface temperatures to match the past El Nino occurrences.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Some researchers have undertaken some psychological studies which prove that many children develop fears of ______ dangers.
A.
imagination
B.
imaginary
C.
imaginable
D.
imaginative
【单选题】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 U...
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.
【单选题】Researchers have found that migrating animals use a variety of inner compasses to help them navigate. Some (1)_____ by the position of the Sun. Others navigate by the stars. Some use the Sun as (2)___...
A.
move
B.
fly
C.
steer
D.
swim
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