日本历来是一个善于学习的民族。在古代，日本曾经效仿隋唐进行过大化改新，通过这次改

有关讲授法的概念，错误的是()

A．系统化连贯地讲授科学知识，可以改造学生原有知识结构

B．讲授者“语言流”中的逻辑性能启发学生的思路

C．讲授法是造成学生被动学习的主要原因

D．讲授法使学生得到的是“第二手”资料

气的固摄作用体现在（）。

A.固摄血液

B.固摄汗液

C.固摄唾液

D.固摄二便

E.固摄精液

柴油的牌号表示柴油的（）。

A.抗爆性

B.凝点

C.粘度

D.蒸发性

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．Routing protocols in internetworks differ slightly from the idealized graph model．In aninternetwork，the goal of the routers to forward packets to various (72) ．
Routers running RIP send their advertisement about cost every (73) seconds．A router also sends an update message whenever an update from another router causes it to change itsrouting table．
It is possible to use a range of different metrics or costs for the links in a routing protocol．RIP takes the simplest approach，with all link costs being equal (74) Thus it always tries tofind the minimum hop route．Valid distances are 1 through (75) ．This also limits RIP torunning on fairly small networks．

A．6
B．10
C．15
D．16

代谢性酸中毒可发生于（）

A．急性肠梗阻

B．感染性休克

C．肺炎高热

D．慢性十二指肠瘘