你知道是谁发明了电灯泡吗?______do you know______ the electric light bulb?
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![你知道是谁发明了电灯泡吗?______do you know______ the electric light bulb?](/uploads/image/z/7401318-6-8.jpg?t=%E4%BD%A0%E7%9F%A5%E9%81%93%E6%98%AF%E8%B0%81%E5%8F%91%E6%98%8E%E4%BA%86%E7%94%B5%E7%81%AF%E6%B3%A1%E5%90%97%3F______do+you+know______+the+electric+light+bulb%3F)
你知道是谁发明了电灯泡吗?______do you know______ the electric light bulb?
你知道是谁发明了电灯泡吗?______do you know______ the electric light bulb?
你知道是谁发明了电灯泡吗?______do you know______ the electric light bulb?
Who,invented
who,invented