以下属于禁用兽药的是（）。
A.替硝唑及其盐、酯及制剂
B.头孢拉啶
C.土霉素
D.罗红霉素
参考答案：A
--- He went to see the man who was in hospital yesterday.
--- ____________.
A．So did he
B．So he did
C．He did so
D．Did so he
学校咨询与辅导的主要工作有哪些
