A. A.2) stands for_______. its intelligence and cost are beyond questionB. it is able to bear the rough environmentC. it is made as complex as the human brainD. its architecture is different from that of the present ones 参考答案:D 答案解析:推理题。本题需要根据上下文判断“carbon”一词在文中所代表的内容。文章第二段中作者指出在不远的将来,即几十年后,就会出现可与人类媲美,甚至超过制造它们的人类的硅机器人。一旦硅机器人超过人类,它们就