单项选择题

They demand to set up an organization flexible enough to cope with any emergency.

A．portable
B．valiant
C．trivial
D．mobile
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单项选择题
It is said that science has become too complex to acknowledge the existence of universal truths.
A．address
B．declare
C．affirm
D．perceive
单项选择题
In the country we are excluded from the worries of life in a big town.
A．enveloped
B．protected
C．insulated
D．subtracted
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