单项选择题

The present universal fear has been the result of a forward surge in our knowledge and ______ of certain dangerous factors in the physical world.

A．automation
B．perception
C．manipulation
D．administration
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单项选择题
People who live in small towns often seem more friendly than those who living in __ populated areas.
A．thickly
B．densely
C．heavily
D．keenly
单项选择题
Speakers at graduation ceremonies are always among the most ______ members of the community.
A．discouraged
B．dissatisfied
C．distinguished
D．disappointed
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