单项选择题

Though science is often imagined as a disinterested subject, scientists are no different from anyone else: they are ______ human beings enmeshed (陷入:卷入) in a web of personal and social circumstances.

A．vulnerable
B．rational
C．careless
D．passionate
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单项选择题
The supply of copper in the mines had______, causing great concerns among the people of the town.
A．increased
B．diminished
C．extended
D．devalued
单项选择题
Talk to anyone in the drug industry,______ you'll soon discover that the science of genetics is the biggest firing to hit drug research since penicillin was discovered.
A．or
B．and
C．for
D．so
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