二恶英是人类进入工业化社会之后的一个典型的副产物。（）

根据马斯洛的需要层次理论和现代动机心理学的研究，儿童第三层次的需要即社会性与自我发展的需要，这一层次包括三种需要，分别是（ ）

A．身体活动的需要

B．社会性交往的需要

C．自我实现的需要

D．尊敬（认可）的需要

E．认知水平的需要

50×24+144÷12=[ ]

A．112    

B．700    

C．1212  

测小灯泡的电阻

（1）在方框内，画出用伏安法测小灯泡电阻的电路图．

（2）如图是测小灯泡电阻的实物连接图，请将电压表接在正确的位置上（用0～3V量程）．

（3）正确连接电路后，改变滑动变阻器的电阻值．电流表和电压表的读数如图所示，通过小灯泡的电流是 _________ A；小灯泡两端的电压是_________V；算得小灯泡的电阻是_________Ω．

下列何者为促成浪费的主要因素（）

A.负荷过重

B.生产过剩

C.多余的加工处理

D.等待信息

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the (71) algorithm. Routingprotocols in internetworks differ slightly from the idealized graph model. In an internetwork, the goal ofthe routers to forward (72) to various networks.
Routers running RIP send their advertisement abOLit cost every (73) seconds. A router also sends an up date message whenever an update from another router causes it to change its routing table.
Routing protocols use different techniques for assigning (74) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. RIP takes the simplestapproach, with all link costs being equal (75) . Thus it always tries to find the minimum hop route. Valid distances are 1 through 15. This also limits RIP to running on fairly small networks.

A．Dijkstra
B．path-vector
C．link-state
D．distance-vector