来自黄健华的问题
英语翻译itisacertainthatarodiselectricallychargedifit__________A.repelsapithballB.attractsapithballC.attractstheN-poleofacompassneedleD.repelstheN-poleofacompassneedleE.pointsnorth
英语翻译
itisacertainthatarodiselectricallychargedifit__________A.repelsapithballB.attractsapithballC.attractstheN-poleofacompassneedleD.repelstheN-poleofacompassneedleE.pointsnorth

