Do you know who invented the electric lamp is? I think they are very useful.
do you know who invent the bulb ? I deem they are very useful
Do you know who electric light was invented by? I think they are very useful
爱迪生，他发现钨的熔点高而启发
Do you know who invented the electric light ? I think it're very useful
do you know who invented the lights?i think they are very useful
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