A. By making it work in such environments as deserts, oceans or space. B. By working hard for 10 or 20 years. C. By either properly programming it or changing its structure. D. By reproducing it. 参考答案:C 答案解析:细节题。本题询问的是人类怎样才能使机器具有智慧。文章第一段的最后一句话说明人类可以通过装进合适的软件或改变其结构使机器具备智能,故选择C为正确答案。