单项选择题

An important objective of both exercises is to develop a structure for rigorously competitive ______.

A．self-review
B．peer review
C．talk show
D．peer counseling
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单项选择题
But it has other advantages in terms of ______ scientific and technical expertise.
A．dissolving
B．dissuading
C．distilling
D．disseminating
单项选择题
Australia provides the only separate, ______ laboratory in which dramatic Quaternary extinction occurred.
A．natural continent-sized
B．natural and continent-sized
C．continent-sized natural
D．continent-sized and large
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