Which of the following arguments could be used to support the placement of the hellcopter on a timellne before the
Invention of a radio amplifier even though both were invented in 1907?
The helicopter is more useful than radio amplifiers and would likely be used more by the public.
The helicopter is used to help transport people in emergency situations to life-saving medical treatment.
The helicopter expanded the role of aviation and led to greater research and development of air travel.
The helicopter was a major breakthrough in transportation that increased the ability to transport goods across the country,
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Which of the following was probably the most difficult challenge facing construction of the railroad?
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Why did poland, hungary, and east germany join the warsaw pact? a)their people voted to join in free elections. b)their efforts to join nato failed. c)they wanted to stop the spread of communism in europe. d)they were soviet satellites that had little choice.
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Which of the following arguments could be used to support the placement of the hellcopter on a timel...
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