You may see "_____" in the reading room.[ ]
A. No Walking
B. No Talking
C. No Photos
答案:B
(),照我罗床纬。(古诗十九首《明月何皎皎》)
已知肺炎衣原体有几个血清型()
A.1
B.3
C.5
D.6
E.8