46 Originally, what did Percy Spencer intend to build up?
(A)Hot stoves.
(B)Magnetrons.
(C)Radar systems.
(D)Microwave ovens.

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統計： A(13), B(62), C(445), D(113), E(0) #1871162

詳解 (共 2 筆)

#3006674

In the 1940s, a scientist named Percy Spencer was working to develop radar systems for the U.S. military. 

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#3023352

Originally, what did Percy Spencer intend to build up?

題目有陷阱

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