—_____ are you leaving here?
—In half a month. [ ]
A. How long
B. How much
C. How soon
答案:C
新生儿期是指
A.从脐带结扎到生后一个月
B.从脐带结扎到生后28天
C.从脐带结扎到生后7天
D.妊娠28周至生后7天
E.妊娠28周至生后28天
简述供水单位卫生许可证发放依据、有效期限和复核期限。