诊断耳胀须具备以下哪几项临床特征()
A.耳胀闷感,听力下降
B.传导性聋
C.混合性聋
D.耳膜淡红,内陷,积液征
E.自听增强
参考答案:A, B, D, E
We a meeting from 2 to 4 yesterday afternoon. [ ]
A. had had
B. would have
C. were having
D. had
尽管世界经济危机尚未结束,中国政府有条件进行大规模投资。