单项选择题

These new assistants are more intelligent than their______.

A．descendants
B．predecessors
C．successors
D．ancestors
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单项选择题
He was unable to______ the police that he had been elsewhere at the time of the crime.
A．overwhelm
B．convert
C．persuade
D．suppress
单项选择题
Changing from solid to liquid, water takes in heat from all substances near it, and this ______ produces artificial cold surrounding it.
A．absorption
B．transition
C．consumption
D．interaction
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