The engineers in this lab spent several weeks _______ their plans for the new bicycle.

单选题

The engineers in this lab spent several weeks _______ their plans for the new bicycle.

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单选题

In Western Australia，there are around 450 aircraft maintenance engineers，most of______work in the Perth metropolitan area.

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单选题

( ) THE DATA IN THE LOGBOOK.

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单选题

most troubles likely to occur with marine diesel engine can, if located in time, be remedied with no difficulty and many can be _____ if the engine is maintained with a high sense of responsibility to the people on the part of the motormen and engineers.

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多选题

The?engineers?are?going?through?with?their?highway?project,?_____?the?expenses?have?risen.(?)

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