We all know that America was _____by Columbus while the electric lamp was ______

题干

We all know that America was _____by Columbus while the electric lamp was ________ by Edison.

A．invented；discovered	B．discovered；invented
C．found；invented	D．found；discovered

上一题下一题 0.4难度单选题更新时间:2018-08-16 10:46:18

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