"Z16781" siû-thin kiên ke chhâ-phe̍t

2024年6月26日 (Sâm) 03:27 ke siû-thin pán-pún

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@@ Thi 95 hàng: / Thi 95 hàng: @@
                     "charges attract",
                     "attractive charges",
-                    "electrostatic attraction"
+                    "electrostatic attraction",
+                    "are opposite signs",
+                    "opposite signs"
                 ]
             }