单项选择题

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

A) artificially
B) automatically
C) manually
D) synthetically
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单项选择题
I was impressed ______ the efficiency of the work done in the company.
A) in
B) about
C) with
D) for
单项选择题
The test results are beyond（）；they have been repeated in labs all over the world.

A.negotiation
B.conflict
C.bargain
D.dispute
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