Tuesday, 6 November 2012

Harmful effects of microorganisms / Kesan mikroorganisma yang berbahaya


Cause illness
 Menyebabkan penyakit

Flu / Selsema
Stomach ache / Sakit perut



















Cause tooth decay             
Menyebabkan pereputan gigi











Cause food to become rotten
Menyebabkan makanan menjadi rosak




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