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

列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?