68% of the 79 inventors with more than 300 utility paten families are from （）.-未来题库

68% of the 79 inventors with more than 300 utility paten families are from （）.

未来题库→百科

68% of the 79 inventors with more than 300 utility paten families are from （）.

A.Australia

B.Japan

C.Germany

D.USA

正确答案：D

Tags:inventors families utility

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