What is the most important feature of the backpack invented by Lawrence C.Rome and his colleagues?

A.It produces electricity for electronic devices while the wearer walks. B.It can be used as cell phones,GPS in the military actions or field studies. C.It is small and convenient. D.It is light and easy to CalTy. 此题为多项选择题。

时间:2023-01-31 14:52:49

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