"The child's life is not in danger any more,"the doctor said ________. [ ]

A. in service  

B. in relief

C. in peace  

D. in charge

需存放在-20℃的疫苗是（）

A.乙脑疫苗

B.卡介苗

C.麻疹疫苗

D.百白破疫苗

E.乙肝疫苗