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(   ) 1. —Could you tell me when the digital camera      

      —In the 1970s.

A. was discovered    B. is discovered C. was developed    D. is developed 

l.C數碼相機是在普通相機基礎上改進而成的。

題目來源:仁愛英語同步練習冊九年級上冊下冊合訂本 > Topic1 When was it invented?

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