冷球蛋白多为（）
A.IgG
B.IgE
C.IgM
D.IgD
E.IgA
参考答案：C
乙胺丁醇是属于杀菌剂抗结核药。
Her black shoes _________ 18 yuan.[ ]
A. isn't
B. is
C. are
D. don't
