(A) 14.8mm (B) 20.9mm (C) 39.7mm (

昕玥2019-12-17  1

问题 (A) 14.8mm(B) 20.9mm(C) 39.7mm (D) 53.9mm

选项

答案A

解析[img]/upload/tiku/191/2461133_1.jpg[/img][img]/upload/tiku/191/2461133_1_1.jpg[/img]
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