禽类消化系统中,主要起贮存、湿润和软化食物作用的器官是()
A.口腔
B.食管
C.嗉囊
D.腺胃
E.肌胃
参考答案:C
不能被T细胞识别的抗原决定基有()
A.载体决定簇、隐蔽性决定簇
B.半抗原决定簇、功能性决定簇
C.半抗原决定簇、顺序性决定簇
D.隐蔽性决定簇、T细胞决定簇
E.构象决定簇、不连续决定簇
--- Could you tell me ?
--- His home is quite far away from the office, I think.
A.whenhegotup
B.whyheboughtthecar
C.whereheworks
D.howhelikeshisjob