小婷想在桶上凿个洞后放在窗台上浇外面的花圃，要想水喷得远些，她应该把洞凿的怎么样？
参考答案：她应该把洞凿的低些。
Open Shortest Path First(OSPF)is a (29) routing algorithm that (30) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (31) processing power. The Dijkstra algorithm is used to calculate (32) OSPF routing table updates only take place when necessary, (33) at regular intervals.
29（）
A．distance-vector
B．link-state
C．flow-based
D．selective flooding
公安机关职责具有法律性，是指公安机关的职责是由国家法律和法规所确认的。 ( )
