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■如果發(fā)明物為整個被發(fā)明的一類事物，則其前要用定冠詞。如：　　

Who invented the telephone? 電話是誰發(fā)明的?

The compass was invented in 　　China　　. 指南針是中國發(fā)明的。

It is well known that 　Edison　 invented the electric bulb. 世人都知道愛迪生發(fā)明了燈泡。