CTL细胞杀伤肿瘤细胞的机制是( )
ADCC效应
B. 释放穿孔素杀伤肿瘤细胞
C. 诱导肿瘤细胞凋亡
D. 释放细胞因子
The material can be used in dams except()
A. concrete
B. glass
C. rocks
D. sand
() and ()are two main types of hydraulic structures.
There are three types of concrete dams, namely: ()dams,()dams,()dams.