下列哪种药物对克林霉素所致假膜性肠炎有较好疗效？（）
A.红霉素
B.林可霉素
C.万古霉素
D.杏他霉素
E.麦迪霉素
参考答案：C
--I think our school’s selective courses are of great use and I have learnt a lot from them.
--Yes _______.
A．No problem
B．I couldn’t agree more
C．I don’t think so
D．It doesn’t matter
神经母细胞瘤的标志物是（）
A.APT
B.NSE
C.AFU
D.AFP
E.PAP
