单项选择题

The energy ______ by the chain reaction is transformed into heat.

A．transferred
B．released
C．delivered
D．conveyed
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单项选择题
People in every culture have ______ basic needs but express them differently.
A．alike
B．like
C．same
D．similar
单项选择题
Eye contact is important because wrong contact may create a communication ______.
A．tragedy
B．vacuum
C．question
D．barrier
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