单项选择题

The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.

A．manually
B．artificially
C．automatically
D．synthetically
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单项选择题
This research has attracted wide ______ coverage and has featured on BBC television's Tomorrow's World.
A．message
B．information
C．media
D．data
单项选择题
The city is an important railroad ______ and industrial and convention center.
A．conjunction
B．network
C．junction
D．link
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