Which of the following school rule is true.    [ ]

A. students are allowed to make noise in the hallway. 

B. students are allowed to wear their own clothes. 

C. students are allowed to wear earrings

D. students are allowed to ask teachers questions in class.

在婴儿巨细胞病毒感染的诊断依据中，错误的是（）

A.受检组织中分离出巨细胞病毒

B.受检组织中找到巨细胞包涵体

C.血CMV-IgM阳性

D.血CMV-IgG阳性

E.血CMV-IgG由阴转阳