Inventions e-Book's MCQs - Complete
Traffic light with three colours App MCQs & e-Book Download - 142
Apps:
MCQ:
Which one of the following invents the traffic lights with three colors?
- Sir William Potts
- Dr Dennis Colonello
- Dr Larry wang
- Sir Norman Rolston
a
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Traffic light with three colours Textbook App: Free Download iOS & Android
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