When Otis came up with the idea of a lift ______.

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When Otis came up with the idea of a lift,______.

A. he sold it to the architects and builders immediately

B.the Egyptians used it to build the Pyramids

C.it was accepted favorably by the public

D. most people had doubt about its safety

热搜:关于氨基酸代谢错误的论述是_________。