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What is the main idea of the passage?
O Pencils have a much lower lead content than they once did
O The name of a material often indicates the material's use.
O Graphite has numerous uses, including the making of pencils.
O Pencils have traditionally been made with graphite.

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What Is The Main Idea Of The Passage O Pencils Have A Much Lower Lead Content Than They Once Did O The Name Of A Material Often Indicates The Materials Use O Gr class=