College Physics ›› 2020, Vol. 39 ›› Issue (11): 10-13.doi: 10.16854 /j.cnki.1000-0712.200188

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ZHAO Kai-hua

QIN Ke-cheng   

  1. School of Physics,Peking University,Beijing 1000871,China
  • Received:2020-05-15 Online:2020-11-10 Published:2020-11-13