a computer scientist - develops new programs , a biologist - collects specimens of wild plants, a physicist - studies the laws of the nature: gravity, light, magnetism, a mathematician - studies numbers, produces formulas and solves problems, a chemist - does experiments with chemical elements, an astronomer - observes the night sky,

scientists

طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟