．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 |
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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 |
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