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#2071: tlips


1752786-4@g.puiching.edu.mo (P6A08林敬晉)

School : Pui Ching Middle School
ID : 3260
IP address : [192.168.120.33]
Last Login ：
2025-10-17 15:44:38
a474. 相反數 | From: [192.168.120.33] | Post Date : 2025-05-13 16:43

use abs

 
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