III. Reading Comprehension (30%； 2% each)        It wasn’t the first machine on the market. To some people, it’s now just part of officefurniture. But whichever way you look at it, IBM’s personal computer has completelyrevolutionized the way we live, work and play, and a quarter of a century after its debut,its power has radically increased in more ways than one. It was 1981, also the year IBMunveiled the 5150, the world’s first personal computer for the mainstream consumer.Now, with just 16 kilobytes of memory, the IBM 5150 was obviously limited. Somecritics said it wasn’t nearly as good as other computers on the market, but the 5150triggered a wave of excitement. It made the business world sit up and notice thatthe PC was not just for geeks.
【題組】36. What is the main topic of this passage?
(A) The IBM company
(B) IBM 5150
(C) The beginning of personal computer
(D) A computer with small memory