受精的鸟卵离开母体后即停止发育，其根本原因是[ ]
A．见到空气
B．温度较低
C．温度较高
D．见到阳光
答案：B
奶牛发生慢性结核病，形成的结核结节属于（）
A.变质性炎
B.渗出性炎
C.增生性炎
D.坏死性炎
E.以上都不是
－Do you know the lady is interviewing our head master?
－Yes, she is a journalist from CCTV. [ ]
A. whom
B. which
C. who
D. whose
