题目

Edison has been considered as one of the greatest inventors in the world and 1093 patents have been in his name.A.registered B.invented C.associated D.preserved 答案：【答案】A【解析】考查动词词义辨析。句意：爱迪生被认为是世界上最伟大的发明家之一，他已经注册了1093项专利。A.registered注册； B.invented 发明；C.associated联系； D.preserved保护。根据上文中“1093 patents have been ”可知，1093项专利已经被注册。故选A。关于波的干涉和衍射现象，下列说法中正确的是A.一切种类的波都能产生干涉和衍射现象B.波只要遇到障碍物就能发生明显衍射现象C.只要两列波叠加，都能产生稳定的干涉图样D.发生干涉现象的两列波频率一定相同