按照旅行社业务操作流程，其第一项基本业务是（）
A.产品开发业务
B.旅游采购业务
C.产品销售业务
D.团体接待业务
参考答案：A
FR电路组网中，中心机房通过（）连接各个网点。
A.DLCI、
B.LMI、
C.PPP、
D.PVC。
A nurse in the nursery is preparing to perform phenylketonuria (PKU) testing. Which neonate is ready for the nurse to test ？（）
A．A 3-day-old neonate who has been fed IV since birth.
B．A 2-day-old neonate who has been breast-fed.
C．A 1-day-old neonate receiving formula.
D．A breast-fed neonate being discharged within 24 hours of birth.
