ߘߊ߲߬ߝߘߊ߬ߓߐ ߡߍ߲ ߦߋ߫ Z16781 ߟߢߊ߬ߟߌ ߟߎ߬ ߕߍ߫

ߛߊߞߍߟߌ ߟߎ߬ ߀߃:߂߇, ߂߆ ߥߊ߬ߛߌ߬ߥߙߊ ߂߀߂߄ ߡߊ߬

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@@ ߛߌ߬ߕߊߙߌ ߉߅: / ߛߌ߬ߕߊߙߌ ߉߅: @@
                     "charges attract",
                     "attractive charges",
-                    "electrostatic attraction"
+                    "electrostatic attraction",
+                    "are opposite signs",
+                    "opposite signs"
                 ]
             }