自身免疫病是由于哪一项免疫功能损害所致（）
A.免疫调节
B.免疫监视
C.免疫防御
D.免疫自稳
E.抗原递呈
参考答案：D
The manager had fallen asleep where he_____, without undressing. [ ]
A. was laying
B. was lying
C. had laid
D. had lied
无线局域网可采用（）网络结构来实现互连
