下列可以通过垂直传播，例外的是（）
A.乙型肝炎病毒
B.EB病毒
C.HIV
D.单纯疱疹病毒
E.流感病毒
参考答案：E
Our flight to Guangzhou was ______ by a bad fog and we had to stay much longer in the hotel than we had expected.
A．delayed
B．adjourned
C．cancelled
D．preserved
男，60岁，无明显诱因心前区剧烈疼痛持续3h，伴烦躁，大汗，恐惧，濒死感，休息及含硝酸甘油无效，应考虑是
A．胃痉挛B．胆道蛔虫C．肾结石D．心肌梗死E．心绞痛
