移植排斥反应的防治原则不包括()
A.血型相配
B.免疫耐受诱导
C.使用免疫抑制药物
D.选择组织相容性复合体(MHC.配型相配的供者
E.预防性使用抗生素
参考答案:E
The book was written in 1946, ____ the education system has witnessed great changes. [ ]
A. when
B. during which
C. since then
D. since when
平地机制动阀的SP2油口接平地机制动器。()