单项选择题

At first, the______ of color pictures over a long distance seemed impossible, but, with painstaking efforts and at great expense, it became a reality.

A．transaction
B．transmission
C．transformation
D．transition
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单项选择题
After earthquake many local firms______ to disaster relief efforts.
A．administered
B．distributed
C．attributed
D．contributed
单项选择题
The lawyer______ me against the accusation of being a thief.
A．protected
B．guarded
C．shielded
D．defended
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