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人教版九年级上册英语Unit 6学习评价长江作业本答案

1Unit 6学习评价第Ⅰ题答案

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6Unit 6学习评价第Ⅵ题答案

         There are many inventions that have caused great changes in the world. Here's a short introduction. For example,the digital camera was invented by Steven J. Sasson in 1975. It is used for taking photos. The telephone was mvented in 1876 by Alexander Bell. It is used for communicating. The radio was invented by  Guglielmo Marconi in 1895. It is used for listening to news and music. They are all useful inventions.

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