解答：上期A、B卷的问答题比较简单，主要以一些概念性问题为主，如电子管机和晶体管机各自的优缺点，在过去的文章中已有介绍，虽然在目前数字化技术已发展到相当高的水平，但是电子管机仍然没有被完全淘汰，其中自然有它的道理。最近翻看日文杂志，发现在数字化水平很高的日 ANSWER: The quiz questions on volumes A and B of the previous issue were relatively simple, mainly based on some conceptual issues, such as the respective advantages and disadvantages of electron tube machines and transistor machines, which were introduced in the past articles. Although digital technologies have been developed Very high level, but the tube machine is still not completely eliminated, of which there is a natural reason. Recently read the Japanese magazine, found in a high level of digital day