【单选题】T 细胞对同种异型MHC分子的直接识别特点不包括
A.
由受者同种反应性T细胞直接识别供者APC表面抗原肽-供者同种异型MHC分子复合物
C.
直接识别机制在移植早期急性排斥反应中起重要作用
D.
直接识别有自身MHC限制性,即供者APC表达的MHC必须与受者T细胞相同
E.
供者MHC抗原需经受者APC处理才能被受者T细胞识别
【单选题】焊接时一般要求对被焊区进行保护,以防止空气的有害影响。如焊接低碳钢时,手工电弧焊( )
【多选题】移植排斥反应的效应机制包括
A.
IL-2、IFN-和TNF a等炎性细胞因子的分泌导致迟发型超敏反应性炎症损伤
C.
同种抗原特异性CTL直接杀伤移植物血管内皮细胞和实质细胞
【单选题】当RIP认为一个网络不可达的时候,此时网络的跳数是( )
【单选题】In which culture is situation 1 likely to occur? M-Time culture or P-Time culture?
【单选题】Of late, there have been several posts suggesting that America has no culture or that what culture it has is somehow inferior to that of other societies. Of course, it cannot be both. To suggest that ...
A.
believes that America has culture despite its inferiority to others
B.
agrees that America has no culture, let alone an inferior culture
C.
objects to both of the views about American culture
D.
tries to show objectively the two views about American culture
【单选题】T 细胞对同种异型MHC分子的直接识别特点不包括
A.
由受者同种反应性T细胞直接识别供者APC表面抗原肽-供者同种
C.
直接识别机制在移植早期急性排斥反应中起重要作用
D.
直接识别有自身MHC限制性,即供者APC表达的MHC必须与受
E.
供者MHC抗原需经受者APC处理才能被受者T细胞识别
【单选题】焊接时一般要求对被焊区进行保护,以防止空气的有害影响。如焊接低碳钢时,氩弧焊( )