单项选择题

The walls of the tunnel are designed to ______ heat.

A．aggregate
B．dissipate
C．radiate
D．segregate
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单项选择题
Your choice of clothes is a ______ of your character, so you should take it seriously.
A．distinction
B．reflection
C．preservation
D．revelation
单项选择题
The soldier was ______ for bravery above and beyond the call of duty.
A．summoned
B．amended
C．denounced
D．commended
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