关于原子能级的叙述，正确的是
A、结合力与原子序数Z无关B
暂无解析
ExcelEnergyCorporation'snewonlinetrainingprogramhas_______(interact)featuresandforumdiscussionsfortrainees.
已知，二次型的秩为2，(I)求实数a的值；(II)求正交变换x=Qy将f化为标准形.
Everymanandeverywomanworkinghere_____withme.
Asfarassheisconcerned,onepieceofmusicisverymuchlike
Studentsenrolledasfull-timecanfully____intheuniversityextracurricularclubs.
