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Izinzuzo zemidlalo yezingane
Ososayensi baseMelika baye benza ukuhlola: Bachitha iminyaka engu-45 belandelela “izingane ezinesiphiwo” ezingu-5 000 ezenza kahle esikoleni.Kutholakale ukuthi ngaphezu kwe-90% "yezingane ezinesiphiwo" kamuva zakhula ngaphandle kwempumelelo enkulu.Ngokuphambene nalokho, labo abanesilinganiso sokusebenza kwezemfundo...Funda kabanzi
