根据用药对象选择适当的药品,在适当的时间,以适当的剂量、途径和疗程,达到适当的治疗目标。充分显示了合理用药的
A.安全性B.有效性C.经济性D.适当性E.相对性
参考答案:D
在Access中,查询“学生”数据表的所有记录及字段的SQL语句是______。
A.select姓名from学生 B.select*from学生C.select*from学生where姓名 D.select学生from。
The metric assigned to each network depends on the type of protocol. Some simple protocol, like RIP, treats each network as equals. The(1)of passing through each network is the same; it is one(2)count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required.A(3)through a network can have different costs (metrics). For example, if maximum(4)is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum(5)is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of service.
4()
A.1atency
B.throughput
C.utilization
D.jitter