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.The development of industry has been________gradual process throughout________human existence,from stone tools to modern technology.                   (2012·浙江,2)

A./;the B.the;a
C.a;/ D.a;a

C

解析第一空process是可数名词,第一次出现一般用不定冠词,且此处表示“一个”的概念;第二空existence是不可数名词,此处表示抽象概念,故用零冠词。

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