题目：
Digital computer is controlled by internally stored programs and (66) of using common storage for all or part of a program and also for all or part of the data necessary for the execution of the programs; executing user-written or user-designated programs; performing user-designated manipulation of digitally represented discrete data, including. (67) operations and logic operations; and executing programs that (68) themselves during their execution.
Analog computer’s operations are analogous to the (69) of another system and that accepts, processes, and produces analog data.
(70) computer integrates analog computer components and digital computer components by interconnection of digital-to-analog converters and analog-to-digital converters.
（68）处填（）。
A．modify
B．correct
C．revise
D．improve
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
