E-books first appeared in the 1990s and have made great improveme_英语解答

E-books first appeared in the 1990s and have made great improvements in their thechnology什么意思
their technology指谁呢?

人气：341 ℃　时间：2020-05-20 19:56:58

解答

E-books最早出现在19世纪90年代,给这个技术带来了巨大的进步.应该是电子技术领域吧.