单项选择题

This device will help the () detectives see things that may remain ().

A．advanced; hidden
B．advancing; hiding
C．advanced; hiding
D．advancing; hidden

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单项选择题
The president's visit to Japan had a positive effect () business () science and technology between the two countries.

A．on; as well as
B．to; as well
C．about; as well
D．in; as well as
单项选择题
The workers are making radios, TV sets and some () things in this factory.

A．another
B．others
C．the others
D．other
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