单项选择题

COALESCE:

A． multiply swiftly
B． heat rapidly
C． divide into pieces
D． expose
E． saturate
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单项选择题
According to the passage, initial improvement in brain function in Homo's ancestors resulted at least partially from which of the following
A． the sharing of resources typical of hunter-gatherer groups to which Homo eventually came to belong
B． the freeing of Homo's heat-sensitive brain from the temperature constraints that had kept its size in check
C． the availability of foods far denser in calories and nutrients than those previously available
D． a rise in Homo's brain weight relative to his body weight
E． morphological solutions of environmental change developed by the robust proto-humans
单项选择题
LACONIC:
A． verbose
B． unique
C． unaffected
D． artificial
E． gregarious
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