单选题 For many years, the principle goal of computer (73) was to write short pieces of code that would execute quickly. The (74) needed to be small, because memory was expensive, and it needed to be fast ,because processing power was also expensive.

单选题 A. users B. programmers C. that D. program

【正确答案】 B

【答案解析】

单选题 A. users B. programmers C. computer D. program

【正确答案】 D

【答案解析】很多年以来，程序员的主要目标是写出短小的程序，以让程序运行得很快。程序必须很短，是因为内存昂贵；程序必须运行得快，是因为用来处理运算所花费的电能是昂贵的。