位置性眩晕可出现
A．恶心呕吐
B．眼震
C．与头位有关
D．耳鸣
E．平衡障碍
参考答案：A,B,C,D,E
Tom was avid for learning and imitating and read everything he could.
A．eager
B．surging
C．appreciative
D．vigorous
气管肿瘤可能有（）。
A.大量脓痰
B.痰有臭味
C.黏脓痰
D.痰中带血
E.粉红色泡沫状痰
