移植排斥反应损伤机制中能激活CTL、NK杀伤移植物,使B细胞产生抗体的细胞因子是()
A.IL-1
B.IL-8
C.IL-2
D.IL-4
E.IL-5
参考答案:C
__________ name is Tom.[ ]
A. Her
B. It's
C. He's
D. His
往复泵停泵如何操作?