急性再生障碍性贫血的病人预防感染的措施是
A.支持疗法
B.抗生素
C.输白细胞
D.保护性隔离
E.输血
参考答案:D
—Shall I begin the lecture?
—I'm afraid we have to wait for a while.John is coming with a microphone.
—________.I can do without the microphone.[ ]
A. I'm sorry
B. Excuse me
C. I beg your pardon
D. Never mind
细胞间相互作用受MHC I类分子限制的是( )
A.TCB.THC.TSD.B细胞E.以上都不是