杀伤病毒感染的靶细胞时,受MHCⅠ类分子限制的细胞是
A. CTL细胞
B. NK细胞
C. 活化的巨噬细胞
D. 中性粒细胞
查看答案
介导细胞免疫的两类T细胞是指
A. Th1,Th2
B. Th1,CTL
C. Th2,CTL
D. Th3,CTL
关于Th1介导的细胞免疫的特点,下列哪项是错误的
A. 炎症发生较迟
B. 伴有IgE水平增高
C. 主要是巨噬细胞,淋巴细胞参与
D. 局部可出现组织损伤
I am sorry ______ written you a letter at the time.
A. to have not
B. to not have
C. not to have
D. not having
Will you lend him a magazine _________?
A. to be read
B. for reading
C. to read
D. he read
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