下列有关CTL杀伤靶细胞的机制不正确的是()
A.释放穿孔素
B.释放颗粒酶
C.释放LTα
D.ADCC效应
E.Fas/Fas1途径
参考答案:D
Boys and girls,please remain________and keep quiet until theelectricity supply returns to normal.
[ ]
A.seated
B.seating
C.to seat
D.seat
安全帽有哪几种作用?