药物不良反应监测报告实行
A．逐级定期报告制度
B．一般报告制度
C．逐级报告制度
D．定期报告制度
E．越级报告制度
参考答案：A
People of different countries and regions, different nationalities and cultures have formed with solidarity an Olympic family, ______they have deepened understanding and enhanced friendship.
A．when
B．which
C．that
D．in which
简述信息检索途径？
