单项选择题

These openness measures are equally important in the ______ of public health.

A．occasion
B．context
C．condition
D．landscape
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单项选择题
The US biodefence research is particularly controversial because of the sheer ______ of the effort.
A．latitude
B．magnitude
C．aptitude
D．attitude
单项选择题
It is now impossible to assess whether such research is of an ______ or defensive nature.
A．active
B．offensive
C．alive
D．optional
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