October 2018 2 19 Report
3.Sebutkanlah gangguan pernapasan yg terjadi pada manusia!
4.Manusia bernapas menghirup oksigen.Jelaskanlah fungsi oksigen di dalam tubuh!
5.Apakah bahaya rokok bagi kesehatan ?
bantuim dong no 3,4,dan 5 :)

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