[单选题] Why could other inventors succeed inshowing motion pictures with their own devices?-湖北继续教育网网校

[单选题][单选题] Why could other inventors succeed inshowing motion pictures with their own devices?

ABecause they had a device calledkinetoscope.

BBecause they asked Thomas Edison tohelp them.

CBecause they got a way of using theirown devices.

DBecause Thomas Edison had successfullysolved certain problems.

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参考答案

试题答案：

D

答案解释：

文中第二段第二句“Edison had solved certain problems，making it possible for other inventors move ahead with their owndevices.”给出了答案。

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