Fans from miles around crowded into the stadium for the concert of Jay Chou on September 4^th, 2012, _____ are popular with teenagers.

A．many of whose songs

B．and many of whose songs

C．many of which songs

D．many of his songs

关于抗菌药物治疗性应用基本原则的叙述不正确的是（）

A.诊断为细菌感染者后，才有指征应用抗菌药物

B.按照药物的抗菌作用特点及其体内过程特点选用抗菌药物

C.尽早查明感染病原，根据病原种类及细菌药敏试验选用抗菌药物

D.在查明感染源之前，应给予最广谱和最新的抗菌药物

E.应综合患者病情、病原菌种类及抗菌药物特点制定治疗方案