特异性免疫治疗的药物是
A.卡介苗
B.干扰素
C.肿瘤免疫核糖核酸
D.转移因子
E.左旋咪唑
参考答案:C
We want __ this book now. [ ]
A. reading
B. am reading
C. read
D. to read
水平循环类停车设备应加装哪些安全装置?