图示结构的自振频率ω（）
A
暂无解析
Theoldmanshouldbetreatedwith____.
MrsZhangoftentellsusthatspringisthetime____peoplegosightseeing.
It’syourjob________thepopstars.
___willMr.Forbesbeabletoregaincontrolofthecompany.
Asisknowntousall,theage_____childrencangotoschoolisseven.