肺脓肿急性化脓性炎症阶段，X线片示（）
A.小片状阴影
B.大片状致密影
C.空洞
D.胸腔积液
E.团块状阴影
参考答案：B
When I came back,I noticed that he was still sitting in the office.He seemed_________ for someone.
A．waited
B．to have waited
C．to be waiting
D．to wait
不能通过输血传播的病原是
A．单纯疱疹病毒
B．耶病毒
C．巨细胞病毒
D．肝炎病毒
E．HIV
